{
  "manageEntity": {
    "action": "Save",
    "entityId": "1689553034",
    "entityType": "Track",
    "nonce": "0xbe4a583f537c083d07a82ff417726a1fb1b38151085d103b777abb0fa53d59ce",
    "signature": "0x3261cd6ab1083e0b6ee67c9e9ec60a731d64de9ebd65981a7585a13a885c8a6f3fd3007c771355dfe6255a64f6d99d7ef1f174df22bf01be705c366d66387b981b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}