The uTrack24 has autoplay feature. This means when you power up the device the playlist gets loaded and the playback starts with no user interaction.
Unfortunately the device does not support network remote commands.
To remote control the device you can use uRemote, or footswitch.
With footswitch you have different options. If the device is in standard playback mode (no playlist) you can set the playback mode in the menu to “single” this means with footswitch you start the playback and once the playback is over the device will loads the same song and you can start the playback with footswitch again.
Or you can put the same song into one playlist multiple times and set “wait for button press” start mode for each song in the playlist. In this case once the song playback is over the next song (which is the same one) gets loaded and with footswitch you can start the playback.
Ps: The footswitch connecion is a standard contact so you can use any unlatching footswitch or motion sensor etc.