diff --git a/src/v0/destinations/customerio_audience/transform.ts b/src/v0/destinations/customerio_audience/transform.ts
index e2411260f08..27a997cb11d 100644
--- a/src/v0/destinations/customerio_audience/transform.ts
+++ b/src/v0/destinations/customerio_audience/transform.ts
@@ -1,6 +1,6 @@
 import { ConfigurationError, isDefinedAndNotNullAndNotEmpty } from '@rudderstack/integrations-lib';
 import { SegmentAction } from './config';
-import { EventStructure, RespList } from './type';
+import { CustomerIORouterRequestType, RespList } from './type';
 
 const { InstrumentationError } = require('@rudderstack/integrations-lib');
 const { batchResponseBuilder, getEventAction } = require('./utils');
@@ -11,7 +11,7 @@ interface ProcessedEvent extends RespList {
   eventAction: keyof typeof SegmentAction;
 }
 
-const createEventChunk = (event: EventStructure): ProcessedEvent => {
+const createEventChunk = (event: CustomerIORouterRequestType): ProcessedEvent => {
   const eventAction = getEventAction(event);
   const { identifiers } = event?.message || {};
   const id: string | number = Object.values(identifiers)[0];
@@ -23,7 +23,7 @@ const createEventChunk = (event: EventStructure): ProcessedEvent => {
   };
 };
 
-const validateEvent = (event: EventStructure): boolean => {
+const validateEvent = (event: CustomerIORouterRequestType): boolean => {
   const eventType = getEventType(event?.message);
   if (eventType !== EventType.RECORD) {
     throw new InstrumentationError(`message type ${eventType} is not supported`);
@@ -52,7 +52,7 @@ const validateEvent = (event: EventStructure): boolean => {
   return true;
 };
 
-const processRouterDest = async (inputs: any[], reqMetadata: any) => {
+const processRouterDest = async (inputs: CustomerIORouterRequestType[], reqMetadata: any) => {
   if (!inputs?.length) return [];
 
   const { destination, connection } = inputs[0];
diff --git a/src/v0/destinations/customerio_audience/type.ts b/src/v0/destinations/customerio_audience/type.ts
index 5a597474c7a..1c5aee81b3f 100644
--- a/src/v0/destinations/customerio_audience/type.ts
+++ b/src/v0/destinations/customerio_audience/type.ts
@@ -1,38 +1,11 @@
+import { Connection, Destination, Metadata } from '../../../types';
+import { FixMe } from '../../../util/types';
+
 export type RespList = {
   payload: {
     ids: (string | number)[];
   };
-  metadata: Record<string, unknown>;
-};
-
-export type EventStructure = {
-  message: {
-    action: string;
-    identifiers: Record<string, string | number>;
-  };
-  metadata: Record<string, unknown>;
-  destination: DestinationStructure;
-  connection: ConnectionStructure;
-};
-
-export type ConnectionStructure = {
-  config: {
-    destination: {
-      audienceId: string | number;
-      identifierMappings: {
-        from: string;
-        to: string;
-      }[];
-    };
-  };
-};
-
-export type DestinationStructure = {
-  Config: {
-    apiKey: string;
-    appApiKey: string;
-    siteId: string;
-  };
+  metadata: CustomerIOMetadataType;
 };
 
 export type SegmentationPayloadType = {
@@ -47,3 +20,62 @@ export type SegmentationHeadersType = {
   'Content-Type': string;
   Authorization: string;
 };
+
+type CIOConnectionConfigType = {
+  destination: {
+    audienceId: string | number;
+    identifierMappings: {
+      from: string;
+      to: string;
+    }[];
+    [key: string]: any;
+  };
+  [key: string]: any;
+};
+
+type CIODestinationConfigType = {
+  apiKey: string;
+  appApiKey: string;
+  siteId: string;
+  [key: string]: any;
+};
+
+type GenericRouterRequestData<
+  CIOMessage = object,
+  CIODestination = Destination,
+  CIOConnection = Connection,
+> = {
+  message: CIOMessage;
+  metadata: Metadata;
+  destination: CIODestination;
+  connection: CIOConnection;
+  [key: string]: any;
+};
+
+type CIODestination<CIODestinationConfig = FixMe> = {
+  Config: CIODestinationConfig;
+  [key: string]: any;
+};
+
+type CIOConnection<CIOConnectionConfig = Record<string, unknown>> = {
+  config: CIOConnectionConfig;
+  [key: string]: any;
+};
+
+export type CustomerIOMessageType = {
+  action: string;
+  identifiers: Record<string, string | number>;
+  [key: string]: any;
+};
+
+export type CustomerIOMetadataType = Metadata;
+
+export type CustomerIODestinationType = CIODestination<CIODestinationConfigType>;
+
+export type CustomerIOConnectionType = CIOConnection<CIOConnectionConfigType>;
+
+export type CustomerIORouterRequestType = GenericRouterRequestData<
+  CustomerIOMessageType,
+  CustomerIODestinationType,
+  CustomerIOConnectionType
+>;
diff --git a/src/v0/destinations/customerio_audience/utils.ts b/src/v0/destinations/customerio_audience/utils.ts
index 84a539145f0..17c3bcabe09 100644
--- a/src/v0/destinations/customerio_audience/utils.ts
+++ b/src/v0/destinations/customerio_audience/utils.ts
@@ -2,27 +2,28 @@ import { base64Convertor } from '@rudderstack/integrations-lib';
 import { BatchUtils } from '@rudderstack/workflow-engine';
 import { BASE_ENDPOINT, MAX_ITEMS } from './config';
 import {
-  ConnectionStructure,
-  DestinationStructure,
-  EventStructure,
+  CustomerIOConnectionType,
+  CustomerIODestinationType,
+  CustomerIOMetadataType,
+  CustomerIORouterRequestType,
   RespList,
   SegmentationHeadersType,
   SegmentationParamType,
   SegmentationPayloadType,
 } from './type';
 
-const getIdType = (connection: ConnectionStructure): string =>
+const getIdType = (connection: CustomerIOConnectionType): string =>
   connection.config.destination.identifierMappings[0]?.to || 'id';
 
-const getSegmentId = (connection: ConnectionStructure): string | number =>
+const getSegmentId = (connection: CustomerIOConnectionType): string | number =>
   connection.config.destination.audienceId;
 
-const getHeaders = (destination: DestinationStructure): SegmentationHeadersType => ({
+const getHeaders = (destination: CustomerIODestinationType): SegmentationHeadersType => ({
   'Content-Type': 'application/json',
   Authorization: `Basic ${base64Convertor(`${destination.Config.siteId}:${destination.Config.apiKey}`)}`,
 });
 
-const getParams = (connection: ConnectionStructure): SegmentationParamType => ({
+const getParams = (connection: CustomerIOConnectionType): SegmentationParamType => ({
   id_type: getIdType(connection),
 });
 
@@ -30,7 +31,7 @@ const getMergedPayload = (batch: RespList[]): SegmentationPayloadType => ({
   ids: batch.flatMap((input) => input.payload.ids),
 });
 
-const getMergedMetadata = (batch: RespList[]): Record<string, unknown>[] =>
+const getMergedMetadata = (batch: RespList[]): CustomerIOMetadataType[] =>
   batch.map((input) => input.metadata);
 
 const buildBatchedResponse = (
@@ -38,8 +39,8 @@ const buildBatchedResponse = (
   endpoint: string,
   headers: SegmentationHeadersType,
   params: SegmentationParamType,
-  metadata: Record<string, unknown>[],
-  destination: DestinationStructure,
+  metadata: CustomerIOMetadataType[],
+  destination: CustomerIODestinationType,
 ) => ({
   batchedRequest: {
     body: {
@@ -65,8 +66,8 @@ const buildBatchedResponse = (
 const processBatch = (
   respList: RespList[],
   endpoint: string,
-  destination: DestinationStructure,
-  connection: ConnectionStructure,
+  destination: CustomerIODestinationType,
+  connection: CustomerIOConnectionType,
 ): any[] => {
   if (!respList?.length) {
     return [];
@@ -93,8 +94,8 @@ const processBatch = (
 const batchResponseBuilder = (
   insertOrUpdateRespList: RespList[],
   deleteRespList: RespList[],
-  destination: DestinationStructure,
-  connection: ConnectionStructure,
+  destination: CustomerIODestinationType,
+  connection: CustomerIOConnectionType,
 ): any[] => {
   const segmentId = getSegmentId(connection);
 
@@ -115,7 +116,7 @@ const batchResponseBuilder = (
   return [...insertResponses, ...deleteResponses];
 };
 
-const getEventAction = (event: EventStructure): string =>
+const getEventAction = (event: CustomerIORouterRequestType): string =>
   event?.message?.action?.toLowerCase() || '';
 
 export { batchResponseBuilder, getEventAction };