{
  "manageEntity": {
    "action": "Save",
    "entityId": "217708",
    "entityType": "Track",
    "nonce": "0x414d15a63ee4d8081f7aeea3c8252135588d743c01fafa6d62f2bb31bf673d6e",
    "signature": "0x41d55e6cdd059962e3b8bca58a893d75847478e2798fe9ac3e6a442ad48fa32224a3d2d943b4b2c84ab71157e0c20c68e6bf56a8f9b6d3463cc2389fb746c7bf1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}