{
  "manageEntity": {
    "action": "Save",
    "entityId": "579282",
    "entityType": "Track",
    "nonce": "0x75e8dba6a054fdcd18f8633b6e7cf541fa4a30016b23f67db4ac9598b556c55e",
    "signature": "0x9aa72899dffaa4d757e709e5b566d306cc4dac5dfdeba0758893d743c7398ba003bd923174c893e2769a311af23c0fb77d07de3319bab2c93ddb1649204707381b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}