{
  "manageEntity": {
    "action": "Save",
    "entityId": "410426477",
    "entityType": "Track",
    "nonce": "0x6a3d9b336e40ff35319e817ae846fd6f9738ccdbea5ddac4868405096a53d64b",
    "signature": "0xfbb9bab595f9d511131b95336cb44fba342a0da06ddce4e3c04c30eb0d5aba8b381d4350cf7fc2178b8b6129d1bf89fcfe2c44e2d81714d17e7e599815ceb8e11b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}