code: def serialize_json_string(self, value):
          
  
          # Check if the value might be a json string
          if not isinstance(value, six.string_types):
              return value
  
          # Make sure it starts with a brace
          if not value.startswith('{') or value.startswith('['):
              return value
  
          # Try to load the string
          try:
              return json.loads(value)
          except:
              return value
docs: Tries to load an encoded json string back into an object
          :param json_string:
          :return: