PIF spoofing JSON follows the exact format of PIF module for more info please see:
https://github.com/chiteroman/PlayIntegrityFix/blob/main/module/pif.json

Sample JSON Content (credits and thanks to chiteroman):
{
    "ID": "AP31.240617.009",
    "BRAND": "google",
    "DEVICE": "husky",
    "FINGERPRINT": "google/husky_beta/husky:15/AP31.240617.009/12094726:user/release-keys",
    "MANUFACTURER": "Google",
    "MODEL": "Pixel 8 Pro",
    "PRODUCT": "husky_beta",
    "SECURITY_PATCH": "2024-07-05",
    "DEVICE_INITIAL_SDK_INT": 21,
    "SPOOF_PACKAGE_MANAGER": false,
    "DEBUG": true
}