{
  "manageEntity": {
    "action": "Save",
    "entityId": "482907",
    "entityType": "Track",
    "nonce": "0x6d8b79cc3d364f6c5516d8ee28269724670ad8baafe5e071ed8f7b9b2ab05121",
    "signature": "0x233e747b39e9703207e758d47ef696617e0245b4385dbad2b72147bfbdea88cd0e847f3f1a88088fe8d8944518d432fe7229aa99ed597eef4f35801aedaf13071c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}