{
  "manageEntity": {
    "action": "Save",
    "entityId": "462072",
    "entityType": "Track",
    "nonce": "0xf28ac48d60a14805b560e55deb4ca23f662188a2076916af095d820e0e6b72f1",
    "signature": "0xc2747f5ee0ba0c9c9adf85c2aa120c117aca0e92be0105fe3b9af3b85a6448c177a7e7cdaa3da8fbcf85dadb3545c40fbeb461153ccbcf7008f9b2ea6777270a1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}