{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xef14ea5b6d5de7d4c97ef7476377f484b61f805bfeb1d5ac460f55c0eee971f8",
    "signature": "0xdace6ff689fae270142cf93d96c962d3e7ebc668dcba059fceb21d55c1278b5f14a3901e05327c60d23ca73cf5bf8d7e44b5384a9579b3577e19a013b84e43661c",
    "signer": "0xA3001241cfDdDC4b655c668a27d7cEc490f1cF66",
    "userId": "147669187"
  }
}