{
  "manageEntity": {
    "action": "Save",
    "entityId": "1439323818",
    "entityType": "Track",
    "nonce": "0xf8a5d635fd5b1d97638545b2bdb3c8d667f8cfb29e689ec2d62d7c1f1f8f55d1",
    "signature": "0xdfe796053d02abae9767b024877f02c42ae07f3554146d80c4d9d5a218ccf1e27323445b8ddb660371de825c2cc4a0ac5c824e3bfc9bd804fa297672fe7243591b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}