{
  "manageEntity": {
    "action": "Save",
    "entityId": "883319188",
    "entityType": "Track",
    "nonce": "0xfbb609b9e22f1d9a802ec314fc9652b21618d57f6eb4279e580746436f87a9d1",
    "signature": "0x0b11aac0e93cfaaacb717bdcfae6edb445afb0865199b6989c4766b6857af13e2a71e20aaeaf18fdf4199978c82bcb1910a6a29de2706427194966a99b7b0a651b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}