code: def _handle_utf8_payload(body, properties):
          
          if 'content_encoding' not in properties:
              properties['content_encoding'] = 'utf-8'
          encoding = properties['content_encoding']
          if compatibility.is_unicode(body):
              body = body.encode(encoding)
          elif compatibility.PYTHON3 and isinstance(body, str):
              body = bytes(body, encoding=encoding)
          return body
docs: Update the Body and Properties to the appropriate encoding.
  
          :param bytes|str|unicode body: Message payload
          :param dict properties: Message properties
  
          :return: