Music Event

@EventMethod
public void onGamePlayMusic(GamePlayMusicEvent event) {

    //Maybe get the track that is going to be played to the player
    Track track = event.getTrack();

    //Maybe get the track that is going to be played to the player
    Track customTrack = getCustomTrack(); //could also be a chosen existing track maybe?

    event.setCancelled(true);

    event.getPlayer().playTrack(customTrack);

}