{
  "manageEntity": {
    "action": "Save",
    "entityId": "1429324427",
    "entityType": "Track",
    "nonce": "0x45e7a312f8e8e3bfdc9006126ac54b18ede49e016cab172a7c1ec1e90294ea80",
    "signature": "0xd17a8f200185ba016d931b9950530e6d27eed012d2ff0176e49857030c5523bd4817ae25c5288b0d80d6c15400413c77110b85d085e839e95c5e9fd8b125ed521b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}