There's a faq here: https://savely-editor.com/faq. Currently, only supports manual save editing, where you extract the save file using Savely, modify it using a hex editor or another tool, and then inject the modified save file using Savely here...
I'm not sure it's helpful to upload my resigned one since it's just a copy of the save file you posted but just updated with my account ID? So you wouldn't be able to do anything with it.
But if you post or PM me your account ID or PSN user...
It works fine after resigning on my console, I'm able to copy it to my console. Where does it show up as corrupt, when you start the game or when you copy it back to your console?
I don't have the game so I can't check, but sometimes games will...