{
  "manageEntity": {
    "action": "Save",
    "entityId": "293691041",
    "entityType": "Track",
    "nonce": "0x3b9c8e19ca0a5b313c2a6da3570642d206a5e5aa5e3ad4d642822867365eeafe",
    "signature": "0xbd02fbba4ba748f1f1e78016bdd44c9b09ed23d52fab529c2871c0af65c6b49222c2cd239f4daff7f9abbf554554cc97d7296f796d55804cfe57158efacf7d671c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}