Oh, the poor baby
I'm not usually one to run to the vet with every little problem, but this is one thing where I say, absolutely a case for the vet.
She was probably struggling to free herself and the wound looks almost like a crushing injury. For a wound to heal well and quick, it needs to be clean. Not just clean of dirt and old blood, but also have any non viable tissue and scales trimmed off. Plus, with a wound like that, giving some antibiotics wouldn't hurt !!
After that, just keep her on paper towels and keep the enclosure clean and sanitized until the wound is completely closed.
There is probably some tissue trauma and swelling, but that should heal up in time. But it looks to me like there is some skin and scales that may need to be trimmed off to give you a clean wound that can heal nicely.
The vet will know what to doPlease let us know how it goes...
I'm crossing fingers and toes she will heal up quickly and without any complications.