code: def build_request_body(type, id, attributes=None, relationships=None):
      
      result = {
          "data": {
              "type": type
          }
      }
      data = result['data']
      if attributes is not None:
          data['attributes'] = attributes
      if relationships is not None:
          data['relationships'] = relationships
      if id is not None:
          data['id'] = id
      return result
docs: Build a request body  object.
  
      A body JSON object is used for any of the ``update`` or ``create``
      methods on :class:`Resource` subclasses. In normal library use you
      should not have to use this function directly.
  
      Args:
  
          type(string): The resource type for the attribute
          id(uuid): The id of the object to update. This may be ``None``
  
      Keyword Args:
  
          attributes(dict): A JSON dictionary of the attributes to set
          relationships(dict) A JSON dictionary of relationships to set
  
      Returns:
  
          A valid attribute dictionary. Often used in the ``update`` or
              ``create`` :class:`Resource`` methods.