{
  "manageEntity": {
    "action": "Save",
    "entityId": "483411924",
    "entityType": "Track",
    "nonce": "0xd81be0f6dbad1dbdfb675420ca45c092848bd1eccfe884083115309f8a876cdb",
    "signature": "0x94d1bf7b2b3e8a96c487b6d88ee06f342c31720da98bb571a1eebb5b3cd32f1a18ae86c15dc75ec9fa36a1a185c146ddb105981c89262204879701199be8282a1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}