{
  "manageEntity": {
    "action": "Save",
    "entityId": "291333079",
    "entityType": "Track",
    "nonce": "0xa9cb1d70b76bde4a5d28fbb4a2761a18b6dbff17f900bde4499f16ef37a50ae8",
    "signature": "0x3a7e72421b87dd4baeb71d07773e03fdb3ad39199b9d5a1f7da35f4cad275cbc5e4950c20407e7543b404330a3b2803b415081ffef6358b8276b35959f3e94111c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}