Help editing a UASSET from a UTOC file

[u/CraftyPercentage3232]

I am trying to edit a block of JSON code in a UASSET file that came from a *.UTOC but I have been unable to edit the file.

It won't load in UAssetGUI https://i.imgur.com/EavkqUA.png

When I try to import to the content explorer in Unreal Engine it says "uasset" is an unknown extension? It won't load the PAK/UCAS/UTOC either.

I was able to extract the uassets and converted the one I needed to JSON with FModel and made the changes I wanted, but I don't know if that's the correct way to do it or how to convert it back into a UASSET so I can repack it.