{
  "manageEntity": {
    "action": "Save",
    "entityId": "1785211343",
    "entityType": "Track",
    "nonce": "0x2486ca75f9d67fc3ca8194d3b2ecd4e806bb067360d76c930105b2ad436508b1",
    "signature": "0xa8887f03ec37a6dbb1f75f9b3013365b45bb6e856d4fa88382f6a9de2d5c9aaf4c1ceac69f3b8cf68a2d22b821489d87327ec58fce3b735e84c3b8d4458835ea1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}