readyapi Authorization with AWS returns error

I created AWS Signature profile in the Auth Manager.

When I use it in the test I get the error
{"message":"Credential should be scoped to correct service: 'execute-api'. "}

I Googled the error and the solution appears to be to set the Service to "iotdata"

In ReadyAPI the REST Request Properties Services can't be edited on the REST level.

Has anyone a fix for this issue