lol. Silly Nate. Go back to bed.
@[obrisani korisnik]
There was an error loading the JSON 'cause there are some missing images/regions. It seems like you exported the spine skeleton with an image called "eyes". But the "eyes" image isn't in the exported atlas text.
Did you use Spine's texture packer to export this?
You can make it throw the error by putting the SkeletonData asset onto a SkeletonAnimation component of the unity game object.