<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def validate(self, export):
 """ Validates an Export. :param Export export: :rtype: ExportValidationResponse """

        target_url = self.client.get_url(self._URL_KEY, 'POST', 'validate')
        response_object = ExportValidationResponse()
        r = self.client.request('POST', target_url, json=export._serialize())
        return response_object._deserialize(r.json())