{
  "manageEntity": {
    "action": "Save",
    "entityId": "1415709524",
    "entityType": "Track",
    "nonce": "0x5d2980b331bf3b8267f63aed0f228912b33c180046bee4c8d25f190d06c8f11f",
    "signature": "0x1ea4eba5230bc2ceab8586444cf86221068d666a75b86898c24aaf4d4ec40eb07bc1b603afab0a080b727a068e20adfd89209d0eb52443c569808f1cb16e807d1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}