Saving ListModel content to a file using JSON.stringify() or an other solution

[Allon]

Hi,
I want to be able to save the content of a ListModel in a file in order to retrieve it.
I have been able to do it with a not nested ListModel using JSON.stringify().

However my ListModel contains nested data

Here is a simplified version of it;

import QtQuick 2.12
import QtQuick.Window 2.12

Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")

    ListModel {
        id: fruitModel

        ListElement {
            name: "Apple"
            cost: 2.45
            attributes: [
                ListElement { description: "Core" },
                ListElement { description: "Deciduous" }
            ]
        }
        ListElement {
            name: "Orange"
            cost: 3.25
            attributes: [
                ListElement { description: "Citrus" }
            ]
        }
        ListElement {
            name: "Banana"
            cost: 1.95
            attributes: [
                ListElement { description: "Tropical" },
                ListElement { description: "Seedless" }
            ]
        }
    }

    Component.onCompleted: console.log(JSON.stringify(fruitModel.get(0), ['name', 'cost', 'attributes', 'description']))
}

Output for the first element gives:
{"attributes":{"objectName":"","count":2,"dynamicRoles":false},"cost":2.45,"name":"Apple"}

JSON.stringify displays nested objects and not their content.

Is there an other way to use JSON.stringify() to overcome this problem?
If not what could I do?

Thanks in advance,

Emmanuel