Sure, but at the moment I ran into this issue, and was trying to get my speakers to synch, the last thing I wanted to do was go and find this track. There actually isn't a "metronome" track on spotify, I found one on YouTube but Wiim mini can't play that - it ended up being a big hassle.
Yes, given time you can make this track. But it's also a super trivial feature for Wiim.