def METHOD_NAME(self, get_timestamp_mock):
    get_timestamp_mock.return_value = datetime(2018, 9, 7, 12, 34, 56)
    backend = AirtelTCLBackend()
    backend.set_extra_fields(
        user_name='abc',
        sender_id='def',
        circle_name='ghi',
        campaign_name='jkl',
    )
    msg_obj = QueuedSMS(text='message', phone_number='+916123456789')
    payload = backend.get_json_payload(msg_obj)
    self.assertEqual(
        payload,
        {
            'timeStamp': '07092018123456',
            'keyword': 'ICDS',
            'dataSet': [
                {
                    'MSISDN': '6123456789',
                    'OA': 'def',
                    'CIRCLE_NAME': 'ghi',
                    'CAMPAIGN_NAME': 'jkl',
                    'MESSAGE': 'message',
                    'USER_NAME': 'abc',
                    'CHANNEL': 'SMS',
                }
            ],
        }
    )