QNetworkAccessManager send PUT request with JSON - c++

Question

I want to send a put request with JSON body, but with QNetworkAccessManager doesn't have the option to send a request with JSON so I converted it to QByteArray, the structure of the body, when converted to QByteArray, is not a JSON format so that I received an Error with
"Error downloading https://example.api.com/something/DataSet('123456780XYZ') - server replied: Forbidden"
The JSON format I want is like this:
{
"d": {
"Duration": "0.000",
"Id": "123456780XYZ",
"LoadCumulLimit": "0.000",
"Notes": "send from postman in Json format"
}
}
Here is what did I do
QJsonObject data;
data["Duration"] = workplace->data["duration"];
data["Id"] = id;
data["LoadCumulLimit"] = workplace->data["load_cumul_limit"];
data["Notes"] = workplace->dataText["Notes"];
QJsonObject newData;
newData["d"] = data;
QJsonDocument doc(newData);
qDebug() << url;
QByteArray finalData = doc.toJson();
qDebug() << finalData;
reply = manager->put(request, finalData);
connect(reply, &QNetworkReply::finished, [=](){
if(reply->error() == QNetworkReply::NoError){
QString contents = QString::fromUtf8(reply->readAll());
qDebug() << contents;
}
else{
QString err = reply->errorString();
qDebug() << err;
}
reply->deleteLater();
});
But I received the QByteArray like this:
"{\n \"d\": {\n \"Duration\": 8,\n \"IgelId\": \"123456780XYZ\",\n \"LoadCumulLimit\": 25,\n \"Notes\": \"send from IGEL\"\n }\n}\n"