anchor.diff:              - `ENTRY_INVALID_DESCRIPTION` if the submitted `description` is malformed (regex: ^[\s\S]{3,}$)
               - `ENTRY_INVALID_TAG` if one of the submitted `tags` is malformed (regex: ^[a-z0-9\-\.]{3,20}$)
               - `ENTRY_INVALID_CONFIGURATION` if the submitted configuration snippet has an unsupported format
  +            - `REQUEST_UNSUPPORTED_CONTENT_TYPE` if the submitted content and/or Content-Type is not `application/json`
   
   + Response 401 (application/json)
       + Attributes (object)
  
positive.code:             - `ENTRY_INVALID_DESCRIPTION` if the submitted `description` is malformed (regex: ^[\s\S]{3,}$)
              - `ENTRY_INVALID_TAG` if one of the submitted `tags` is malformed (regex: ^[a-z0-9\-\.]{3,20}$)
              - `ENTRY_INVALID_CONFIGURATION` if the submitted configuration snippet has an unsupported format
  
  + Response 401 (application/json)
      + Attributes (object)
  
negative.code: 
  + Response 200 (text/plain)
  
  + Response 400 (application/json)
      + Attributes (object)
          + status (string) - Textual description of the HTTP status
          + message (string) - Detailed error information, e.g. hint about malformed request
  