{
  "manageEntity": {
    "action": "Save",
    "entityId": "1174276014",
    "entityType": "Track",
    "nonce": "1792448132263131408",
    "signature": "0x140808d1a0efd53de2e82b71adbecc51c232969fb64370920c240ff2b622056874af325e6f1b63d46f96dcc43781b6a840595a0608422b51f44c60d7ea710a1e1c",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}