{
  "manageEntity": {
    "action": "Save",
    "entityId": "2146568463",
    "entityType": "Track",
    "nonce": "0x58d9c52805fda2613723845908c7b508c53dafdb3d74f3df0452e0f37fc967c2",
    "signature": "0x699cb46598fd141f0d8f8510689f7b861c3412b6f5f3bc4e3e332255f1f5cbe3485b4d8293ed46944cd54ffe0fabe4cd13806fc80d20ebe2d855154c43a14c381b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}