code: def common_values_dict():
      
      now = datetime.datetime.utcnow().isoformat()
      etag = utils.gen_etag()
      values = {
          'id': utils.gen_uuid(),
          'created_at': now,
          'updated_at': now,
          'etag': etag
      }
  
      return values
docs: Build a basic values object used in every create method.
  
         All our resources contain a same subset of value. Instead of
         redoing this code everytime, this method ensures it is done only at
         one place.