{
  "manageEntity": {
    "action": "Save",
    "entityId": "662092623",
    "entityType": "Track",
    "nonce": "0x562500e027ff72e5bd5da6eb2ba64574f08f7de362ef5238b1436b965eac2230",
    "signature": "0x44884462e83a4d275e76fd2a200c726e2c0e679918c8047b3201f379fa0cf7dd634462d4439d35d462d97c94542178d17a09a6829341087045a45280f5ceb0261b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}