Ifttt google assistant spotify tutorial

I am trying to create an applet on ifttt were i combine google assistant with spotify to add a track to a playlist. I know that there are a lot of applets that do this, but i want to learn how they work and be abel to make 1 myself. The part about google assistant i figured out, but i cant find how the spotify action works. Can sombody help me with this?
Thanks
Lars