For icons that display next to field names like so on lists...

[![enter image description here][1]][1]

...How can we replace them with custom icons, or fluent UI icons? 

My current JSON file for formatting the body, looks like this...

```json
{
    "sections": [
        {
            "displayname": "About the Recipe",
            "fields": [
                "Title",
                "Number of views",
                "Author",
                "Publishing Date",
                "Description",
                "Nutrition Facts",
                "Number of ingredients",
                "Number of servings",
                "Calories per serving"
            ]
        },
        ....

```



  [1]: https://i.sstatic.net/c14lG.png