Okay I went a bit far, I injected stuff to see if I could outright break it...
You can name the object "\nmodel:\n" and then save it... it saves!
BUT when you load it, it absolutely breaks, it renders the model I saved, but the mesh in the model is unclickable, I'm impressed it didn't break further.
Copy this text block below with both blank lines above and below to get the same effect.
model:
... (I'm going to keep breaking your file load/save until you convert it to JSON ... MUAHAHAAhahaha :P)