{
  "manageEntity": {
    "action": "Save",
    "entityId": "882936642",
    "entityType": "Track",
    "nonce": "0x2572d197778c336453a25bde41b3b6b4c17b03255bd1a2b47bb858b75fb74940",
    "signature": "0x4e8c62467d07237a7f6de58691fe617b0173cd9358fa5cd15ef6e99b91fd9934188dbd25271f43c9f9e35aa526d4d56189468bd996b9dfb78f4c2276eb2704d81c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}