anchor.diff:                      }
                   }
               }
  -
  
positive.code: + Request
      + Headers
  
              Accept: application/hal+json
  
  + Response 200 (application/hal+json)
      + Body
  
negative.code:                 "person_id": "10ce24de-23f6-433f-9a71-255cffffa96f"
              }
  
  + Response 201
      + Headers
  
              Location: https://helpful.io/api/messages/bb7aae7e-c560-4b3d-b235-71e4305952b8
              Link: <https://helpful.io/api/messages/bb7aae7e-c560-4b3d-b235-71e4305952b8>;rel="self", <https://helpful.io/api/people/10ce24de-23f6-433f-9a71-255cffffa96f>;rel="author", <https://helpful.io/api/conversations/9aedccd5-0261-4158-bc1c-0e377b306f02>;rel="conversation"
  
      + Body
  
  