(adsbygoogle = window.adsbygoogle || []).push({}); I've created a website/tool to resign save files for the PS4 here (amongst other save tools): https://savely-editor.com/ps4-save-resigner. It's free but you just have to signup for an account here: https://savely-editor.com/user/signup. Then you go to the Settings page and set your PS4 Offline Account ID or PSN Username and you can use the resigner/extractor/injector.

I'm looking for people to test it out and give feedback on the tool. You can follow here for updates on questions/features/fixes: https://www.patreon.com/c/unknownv2 and the discord server is here: https://discord.gg/rmT3qdjZzA.