{
  "manageEntity": {
    "action": "Save",
    "entityId": "641578002",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb8c5e4fb856819757f18193d212029cf00d7d83628f865ea5e10c02e507cdd2e",
    "signature": "0x19c0d1bcf41a58866ea1d810ab148e43b784839a64812fe3dc785dac6e37ba9145b30fa8185df15785c76c2709eb2082276b2876528848c7b47666bd8ba078e51b",
    "signer": "0xaa261Bcf14A742a42a1D48A9Df726257868F74Db",
    "userId": "793907461"
  }
}