code: public static void play(Context context, String clientId, SoundCloudTrack track) {
          Intent intent = new Intent(context, PlaybackService.class);
          intent.setAction(ACTION_PLAY);
          intent.putExtra(BUNDLE_KEY_SOUND_CLOUD_CLIENT_ID, clientId);
          intent.putExtra(BUNDLE_KEY_SOUND_CLOUD_TRACK, track);
          context.startService(intent);
      }
docs: Start the playback.
  <p/>
  Play the track matching the given position in the given playlist.
  
  @param context  context from which the service will be started.
  @param clientId SoundCloud api client id.
  @param track    the track which will be played.