{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x37d72fd36a8912e54ee018afcf7a001a4ed712000c651e6332680921f4124ae2",
    "signature": "0x606aa0ce34b219ad1cd6d8e3f64b84b74abfbe6a9b8bd21339e304d0231445f62d480a396e5a06daaec0f0810399cf3968cbf091d1ddbe3e51edf2588b7c96ab1c",
    "signer": "0x82B68483dc7868a09e69ceC5b08AC29DC11666F5",
    "userId": "475953882"
  }
}