{
  "manageEntity": {
    "action": "Save",
    "entityId": "673382643",
    "entityType": "Track",
    "nonce": "0xe8e977f390d0c7f7fbf1772474cad4ef9c0625d2f421b7b7cf1f02cb7238371f",
    "signature": "0xe0f1fa18a71049b5d1babb4630adf7b5648fb3989a99086e1e44328950efce9824eeebb05e02a2faebee86dba453978cda84ddb67e1514688a061532e52f44301c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}