How does the
UUIDLeast tags affect the UUID of the the mob you're summoning in? I've looked all over and the best in-depth (from what I can see) wiki on it is in German, and frankly google translate doesn't translate good enough.
This is the link to the German wiki: http://minecraft-de.gamepedia.com/UUID
So can anyone give me info on this? I have like no info on how to use it properly.