{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8e4c35e8249c3995c118d614173541bd32bb9770e31a7f09af247a3fc6fd2223",
    "signature": "0xebfeec6de734d21d1f08bc5a456fc6fa9f66afa84278a4bdf6ef038a011b242f75fc5c53f6dbc7e39e266140744a19abc122a60b6d07b1464af397ebf7d8fd2f1b",
    "signer": "0x0aDF4E4289dc86baA39276037bBF25017Ed782A6",
    "userId": "68524173"
  }
}