{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xfc8318dc5f8690cfbfa587e366417652d4c05bccffa0ee37173f2bf6dd02fa3c",
    "signature": "0xd1f6a648cf03d2aab6478f731138e732aceddcac1bf00652334e5a08f5afab1276d8148b97e2866b8442b170e2ed5b672566caa01f0eabcd5a850c7ba07787d51c",
    "signer": "0xf794D3d12F805546B3437B9f34deacea98B21161",
    "userId": "890696251"
  }
}