Halo 4 - Forge Mechanics Question(s)

Just a quick question, I’ve been trying to research some information on this, but have mostly come up short.

Does anybody have any idea what “User Data” does on Forge? It’s under Advanced in the Object Options. It has a number next to it (similar to Spawn Sequence), and the numbers range from -100 to 100. If anyone has any information on this, I’d be very interested to hear it. Thank you.

I also would love to hear from 343i on what these mean and how to forge them.