Invoke the deserializer

        The JsonDeserializer.deserializer() method will
        return a dict of the JSON payload.

        :return:
            normalized dict

def deserialize(self):
        """ Invoke the deserializer

        The JsonDeserializer.deserializer() method will
        return a dict of the JSON payload.

        :return:
            normalized dict
        """

        body = super(Deserializer, self).deserialize()

        self.parse(body)
        return self.normalize(body)