innermasks@1x.out.json

{
	"BoxC": {
		"frame": {
			"x": 0,
			"y": 0,
			"width": 200,
			"height": 200
		},
		"subLayerNames": []
	},
	"BoxB": {
		"frame": {
			"x": -100,
			"y": -100,
			"width": 300,
			"height": 300
		},
		"subLayerNames": [
			"BoxC"
		]
	},
	"BoxA": {
		"frame": {
			"x": 343,
			"y": 257,
			"width": 400,
			"height": 400
		},
		"subLayerNames": [
			"BoxB"
		]
	}
}