{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x25ea1b74ac09c7ff2ca2d2246b9cd461cd9698e30e029e7d05eacaf2c3112c65",
    "signature": "0x5d011ee027f490e849af02d8f8d06ca2093a200fabc8d5bb9a9ff8350c4b44f303722e76692c0caf50cab71473636d131c1cda816a24afaf0c090f47e43d4f3d1b",
    "signer": "0x3A8886266000f8EE9c2710f26D48Fe779Ea52121",
    "userId": "530486745"
  }
}