Adjust test command in README

README.md

@@ -6,8 +6,8 @@ Run extended reth full node with the added rpc endpoint with:
 `RUST_LOG=info cargo run -- node --full --metrics 127.0.0.1:9001 --http --enable-ext`
 
 ## Test it
-While there are no automated tests yet you can execute a manual test using the provided testdata:
-`curl --location 'localhost:8545/' --header 'Content-Type: application/json' --data @test/data/rpc_payload.json`
+While there are no automated tests yet you can execute a manual test using the provided testdata (requires `curl` and `jq`):
+`./test/shoot_single_payload.sh localhost:8545 test/data/single_payload.json`
 
 ## Further Reading
 - [Guide to custom api development based on reth](https://www.libevm.com/2023/09/01/reth-custom-api/)