{
  "manageEntity": {
    "action": "Save",
    "entityId": "485394169",
    "entityType": "Track",
    "nonce": "0xb786a373ce1f4c428900021f8d5ad94f84f1b1984c1f9e359bc52600d4aeaaa2",
    "signature": "0xfbceb74e41ee83e7ebddef7d6d39a3abe565278613ac66f5cfe20d19412307886eac6a630a50f61a6cc9028152ab8103e1151c4344e48cb953e02893b81596ca1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}