I made a tool.
1.mount user data from nand
2.copy all files from save directory to tool/save directory
3.run.bat
4.you can find gamesave in the out directory
Serial: XAJ700438xxxx [2018 HAC-S-JXE-C3]
Serial on device matches serial on box: Yes
Region: Asia Hong Kong
Firmware: 4.1
Color option: Red
Store: Local Store
Was a bundle (if yes, which): NO
Purchase date: july 9 2018
Fusée Gelée works: NO
i have 2018 HAC-S-JXE-C3 work fine with hekate payload
Serial on device matches serial on box: yes
Region: Japan
Firmware: 4.1.0
Color option: Blue/Red
Store: yodobashi
Was a bundle (if yes, which): NO
Purchase date: Jun-13-2018
Serial: XAJ400490XXXXX [2018 HAC-S-JXE-C3]
Serial on device matches serial on box: yes
Region: Japan
Firmware: 4.1.0
Color option: Blue/Red
Store: yodobashi
Was a bundle (if yes, which): NO
Purchase date: Jun-13-2018
Fusée Gelée works:yes