code: def add_model_name_to_payload(cls, payload):
          
          if not cls.MODEL_NAME in payload:
              payload = {cls.MODEL_NAME: payload}
          return payload
docs: Checks whether the model name in question is in the payload. If not, the entire payload
          is set as a value of a key by the name of the model.  This method is useful when some
          server-side Rails API calls expect the parameters to include the parameterized model name.
          For example, server-side endpoints that handle the updating of a biosample record or the
          creation of a new biosmample record will expect the payload to be of the form::
  
              { "biosample": {
                  "name": "new biosample",
                  "donor": 3,
                  ...
                 }
              }
  
          Args:
              payload: `dict`. The data to send in an HTTP request.
  
          Returns:
              `dict`.