{
  "manageEntity": {
    "action": "Save",
    "entityId": "784843169",
    "entityType": "Track",
    "nonce": "0xa925bba419de48a61bdef9ea7cf714b6596c9c590f5be4cd508e3c97e2e6c3a7",
    "signature": "0x6dd732b4f2c07c04fd3dec1f56bf76aa89b2469252a61d69f626867fd3a952302e10825f95e1f9d9c1aa6fcd926e84aae7e21f1db961086866e600ae81fbf9c71c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}