{
  "manageEntity": {
    "action": "Save",
    "entityId": "267878",
    "entityType": "Track",
    "nonce": "0xfdf92b62298b9e3464950f448f3ab650f2092548dc985e3c5dd2b09e7adab58e",
    "signature": "0xf9c215176cf49486d28c96817c1f388ccc42ea880fd929066f93d423983d3b3531fe3ba619a51f9a9492203a16d7f86ff526c9a8a8051c69c44a18c9d2e25f381c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}