{
  "manageEntity": {
    "action": "Save",
    "entityId": "465318316",
    "entityType": "Track",
    "nonce": "0x46334e7fe072e0bb98606806f647af7cfdc8e28964b52d8715a5fc61f7df310d",
    "signature": "0xcdc7288ab0174d27fc56710fbc598d36fec79ea64f2a5b30ea28387186d506ba73cff890c38825cde3b8059c32b5748d6a2654e139836878b0267e435fe8d18b1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}