asyncapi3-1.0.0.0: test/golden/spec-examples/33-channel-parameter-object-json.json
{"address":"user/{userId}/signedup","parameters":{"userId":{"description":"Id of the user.","location":"$message.payload#/user/id"}}}{"address":"user/{userId}/signedup","parameters":{"userId":{"description":"Id of the user.","location":"$message.payload#/user/id"}}}