Make slicer 'list' or 'dropdown' with Json custom theme?

Hello, 

Today I am creating a custom theme with Json language. Does anyone know how to set slicer as a list by default with Json? Closest example I could find is underneath. Thanks in advance,

Sjim.

{
	"name": "SlicerTemplate",
	"visualStyles": {
		"slicer": {
			"*": {
				"general": [{
					"outlineColor": { "solid": { "color": "#444444"}},
					"outlineWeight": 1,
					"orientation": "vertical",
					"responsive": true
				}],
				"data": [{
					"mode": "Basic",
					"relativeRange": "",
					"relativePeriod": ""
				}],
				"selection": [{
					"selectAllCheckboxEnabled": false,
					"singleSelect": true
				}],
				"header": [{
					"show": true,
					"fontColor": { "solid": { "color": "#000000"}},
					"background": { "solid": { "color": ""}},
					"outline": "None",
					"textSize": 10,
					"fontFamily": "Segoe UI"
				}],
				"items": [{
					"fontColor": { "solid": { "color": "#000000"}},
					"background": { "solid": { "color": ""}},
					"outline": "None",
					"textSize": 11,
					"fontFamily": "Segoe UI"
				}]
			}
		}
	}
}