{
  "manageEntity": {
    "action": "Save",
    "entityId": "1467296222",
    "entityType": "Track",
    "nonce": "0x6aae3086b1ffc4669ff322bc0177347f03beafab0650ecd1e1804e587e2f4f6b",
    "signature": "0xde29cfc5cb282b2826dbb9d763200adb90fa5309f95cd7cc49f64def93f18df802ed29a7dd34b870d5c396b75bd8e1f6f71c56870b41ce060c0bc8404195de531b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}