How to send commands

[brendandebeasi]

I have tried to follow the protocol docs for sending a command, but am having difficulty figuring out where to add the "{"type":"IRCommand","deviceId":"13154865","command":"PowerOff"}:status=press".
Any help would be appreciated.
Right now I have:

iq_cmd = self.Iq()
        iq_cmd['type'] = 'get'
        action_cmd = ET.Element('oa')
        action_cmd.attrib['xmlns'] = 'connect.logitech.com'
        action_cmd.attrib['mime'] = (
            'vnd.logitech.harmony/vnd.logitech.harmony.engine?holdAction')
        action_cmd.attrib['action'] = '{"type":"IRCommand","deviceId":"13154865","command":"PowerOff"}:status=press'
        iq_cmd.set_payload(action_cmd)
        result = iq_cmd.send(block=True)
        payload = result.get_payload()
        assert len(payload) == 1
        action_cmd = payload[0]
        assert action_cmd.attrib['errorcode'] == '200'
        response = action_cmd.text
        return json.loads(response)

[ftz]

I´m trying to accomplish the same, but i also have trouble to get it to work :-(
iq_cmd = self.Iq()
iq_cmd['type'] = 'get'
action_cmd = ET.Element('oa')
action_cmd.attrib['xmlns'] = 'connect.logitech.com'
action_cmd.attrib['mime'] = ('vnd.logitech.harmony/vnd.logitech.harmony.engine?holdAction')
cmd = '{"type"::"IRCommand","deviceId"::"21569835","command"::"VolumeUp"}:status=press'
action_cmd.text = cmd
iq_cmd.set_payload(action_cmd)
pprint.pprint (iq_cmd)

"action={"type"::"IRCommand","deviceId"::"21569835","command"::"VolumeUp"}:status=press"

Any idea?
THX