{
  "manageEntity": {
    "action": "Save",
    "entityId": "345195100",
    "entityType": "Track",
    "nonce": "1792299854717512525",
    "signature": "0xe198f63d5e951f373a00a8491f769e8abf4f214488b2a12ee97493b4cf8098a9351085bf437c8cfb3b6ffbf567083ad90b6c0411d2d0637a2064608dc3575ad71c",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}