Improved seat massager sample

samples/seat_massager/common/src/lib.rs

@@ -4,10 +4,16 @@
 
 use serde_derive::{Deserialize, Serialize};
 
+/// A targeted payload.
+/// The targeting details helps on the receiver's side to dispatch the request.
 #[derive(Serialize, Deserialize)]
 pub struct TargetedPayload {
+    /// The instance id for the target entity.
     pub instance_id: String,
+    /// The path within the target enttity to member that we are targetting.
     pub member_path: String,
+    /// The operation to be performed on the target entity's member.
     pub operation: String,
+    /// The operation's payload.
     pub payload: String,
 }