{
  "manageEntity": {
    "action": "Save",
    "entityId": "272437",
    "entityType": "Track",
    "nonce": "0xd5a561d18629791c339ed700d04c2265458654cb05dc3f3521afccbc722bf144",
    "signature": "0x577760abeda842d295513e4c75b535ea940bf64edd5b7ce500ab21ea646723ef597f80f0390904eba116aafdad14697bab01e73e8b211512aa9f64cb0ed9295b1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}