{
  "manageEntity": {
    "action": "Save",
    "entityId": "2139435346",
    "entityType": "Track",
    "nonce": "0x6db842fb6713363d0c140bf136b7cef5a01c0db067ff94986e9e00614983e5c4",
    "signature": "0x4ee054084ad0421b650be1e733f99cefa9d0bd8876a414b60c41d4b091f48b87341e76e7e25439ccb8d628477f41d267f18cf3e82dfd7e10465b8fd8b2ee210a1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}