{
  "manageEntity": {
    "action": "Save",
    "entityId": "1012812",
    "entityType": "Track",
    "nonce": "0x3c017c67a41af9fb8691f403281cf75e28f441dfe12f601c0ba33998a3b7afce",
    "signature": "0x60d25f3d15356a4b03122134f68c1d63ab63b8acdabb09b700bb7aac808ff6eb136247fb712922e7026ef94a41e776af40516c4c9a8bfe46790fce107dacc9441c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}