{
  "manageEntity": {
    "action": "Save",
    "entityId": "2083446224",
    "entityType": "Track",
    "nonce": "0x80a8a0cd98170f5c026c96dc79bbe9c7a16e0f3b72276381be3562ac675da497",
    "signature": "0x63c8f23152d3ad8ea967bd6276b2d35cb802519ba1a04eb42d8b08e982f51e3e1e60eb3271c0c95b24aa7e415e599bdccda5ec4147b57b7fac44e2dbd2c76e881b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}