{
  "manageEntity": {
    "action": "Save",
    "entityId": "1762220277",
    "entityType": "Track",
    "nonce": "1792396367915306106",
    "signature": "0xf59464e5da12b385908cd0e5380f7692588659a75b08deed05bd13041502e2c77dd0e2ef67484e5f7733a2a7246835f00cbac41fa53a616c756c87223e90b6bc1c",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}