{
  "manageEntity": {
    "action": "Save",
    "entityId": "1515487147",
    "entityType": "Track",
    "nonce": "0x9a4a7ac748e9ee05db36cf3b5bee190c54c55930f71423a877c2d45cec112b32",
    "signature": "0xa8fc27459885b7ff9ceef60b014019608533542f471225da4e80da9f1d14dd09188057e0c623ff99014cd687ae3b364bc068d309f5f14097ca2fc3feb37b65481b",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}