OptionalheadersOptionalreplyAn optional subject where a response should be sent. Note you must have a subscription listening on this subject to receive the response.
OptionaltraceIf set, the server will send events representing the flow of the message as it moves through the system to this subject.
OptionaltraceIf true, the message will NOT be delivered, and instead will just generate trace information. Note that in the context of requests, this means the service will not be triggered so the operation will timeout or return no responses.
Optional headers to include with the message.