[TAG1]
name=value1,value2,value3,...

[TAG2]
name=value1,value2,value3,...

[TAG3]
name=value1,value2,value3,...

{"TAG1":["value1","value2",...], "TAG2":["value1","value2",...]}

QSettings settings(":/data.ini",QSettings::IniFormat);
    QStringList groups= settings.childGroups();
    foreach (QString group, groups)
    {
        settings.beginGroup(group);
        QStringList keys = settings.childKeys();
        QJsonArray arr;
        foreach (key, keys) {
            values=settings.value(key);
            QJsonObject object;
            QJsonValue valueJson(values.toString());
            object.insert(key,valueJson);
            arr.append(object);
        }
        qDebug() <<"Array: "<< arr;
        jsonObj.insert(group,arr);
        qDebug()<<jsonObj;

        settings.endGroup()

        }

QJsonObject({"TAG1":[{"name":""}],"TAG2":[{"name":""}],"TAG3":[{"name":""}]})