{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x99b17fa3c1434be7f7b171fe6c87d3f898bcb165f255d9ac528679a08bc900aa",
    "signature": "0x8526f25ccefedce3db248c2c81f9cf4a7a21f01ae8af57b9cb7e01160e05ebb020ea705b7a08d877292f80f209f382971c851ec5f581b80c5788d75039fcc25d1b",
    "signer": "0x995Ca8f2d3956487967aCfd7EA849313C448c3a8",
    "userId": "227564"
  }
}