<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_current_transport_info(self):
 """Get the current playback state. Returns: dict: The following information about the speaker's playing state: * current_transport_state (``PLAYING``, ``TRANSITIONING``, ``PAUSED_PLAYBACK``, ``STOPPED``) * current_transport_status (OK, ?) * current_speed(1, ?) This allows us to know if speaker is playing or not. Don't know other states of CurrentTransportStatus and CurrentSpeed. """

        response = self.avTransport.GetTransportInfo([
            ('InstanceID', 0),
        ])

        playstate = {
            'current_transport_status': '',
            'current_transport_state': '',
            'current_transport_speed': ''
        }

        playstate['current_transport_state'] = \
            response['CurrentTransportState']
        playstate['current_transport_status'] = \
            response['CurrentTransportStatus']
        playstate['current_transport_speed'] = response['CurrentSpeed']

        return playstate