{
  "manageEntity": {
    "action": "Save",
    "entityId": "723879",
    "entityType": "Track",
    "nonce": "0x0638b340f48ffa021d807f53622ffd121ce566353aa2678a2f28d0edaa969743",
    "signature": "0x05c7b5e554463ed4a7ddabadbf78556560244f108fe6a68114edd36260af34b04f2c84d28dba648dd9e0f59b134d1aba984d0c7712945a0b9e0078d81ef932481c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}