I don't think you can force the player to play a particular song, all you can do is make sure it's next in the list and shuffle is switched off. This isn't ideal, but you could then use the next firing of the event to remove the track again and put shuffle back on, I guess.

I tried with onPlaybackEnd too but problem stays. OnPlay event I set SDB.Player.StopAfterCurrent to True and then onPlaybackEnd I play my track but MM still change track after me. Workable, but not to good, solution I found is play track at OnPlay event. Here is problem that MM starts playing next track from Now Playing before I manage to change track.
You say that I can put my track into Now Playing following the current playing track. Is it possible to do this without changing Now Playing playlist order and without turning off shuffle?

OnTrackEnd just means the track has completed; it's not stopping playback. You either need to put your track into Now Playing following the track that's playing now (i.e. Play Next) or you have stop playback yourself. In that case, wait for OnPlaybackEnd rather than OnTrackEnd.

An easy way to stop playback is to set SDB.Player.StopAfterCurrent to True.

I'm trying to play specified track after current track ends so I try to use OnTrackEnd event but it doesn't works as I suppose it should. When this event occurs MM start playing my track but right after that switch to next track.
So, how can I stop MM to switch track one extra time?