foundry/Data/modules/token-variants/templates/configJsonEdit.html

<form class="macro-sheet editable flexcol">
    <div class="form-group stacked command">
        <label>Token Configuration</label>
        <textarea name="config">{{config}}</textarea>
    </div>

    <footer class="sheet-footer flexrow">
        <button type="submit"><i class="far fa-save"></i>{{localize "token-variants.common.apply"}}</button>
        <button type="button" class="format"><i class="fas fa-sparkles"></i> Format JSON</button>
    {{#if hasConfig}}
        <button type="button" class="remove"><i class="fas fa-trash"></i> {{localize "token-variants.common.remove"}}</button>
    {{/if}}
    </footer>
</form>