{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbaf3f058853198ed058c620e40f917c268168703a99d9c2123356c4885c4740c",
    "signature": "0x1548d28f34fe1170558bd26a151fe4574fc34c4aa5e1376559017a61f2f51e7568dd2570334ac6775086cf32a36b3ebca02ea6ca87343623a93fa2f00d4a60d41b",
    "signer": "0x354F77f4De41770d75802956988DC62502fCf0A3",
    "userId": "955651692"
  }
}