code: def get_instance(self, payload):
          
          return SubscribedTrackInstance(
              self._version,
              payload,
              room_sid=self._solution['room_sid'],
              subscriber_sid=self._solution['subscriber_sid'],
          )
docs: Build an instance of SubscribedTrackInstance
  
          :param dict payload: Payload response from the API
  
          :returns: twilio.rest.video.v1.room.room_participant.room_participant_subscribed_track.SubscribedTrackInstance
          :rtype: twilio.rest.video.v1.room.room_participant.room_participant_subscribed_track.SubscribedTrackInstance