Get dimension data

{
	"dim1":[
		{
			"id":75,
			"label":"All Media",
			"xref":null,
			"childListItems":[
				{
					"id":16,
					"label":"Linear",
					"xref":null,
					"childListItems":[
						...
					]
				},
				...
			]
		}
	],
	"dim2":[
		{
			"id":1,
			"label":"World",
			"xref":null,
			"childListItems":[
				{
					"id":45,
					"label":"Europe",
					"xref":null,
					"childListItems":[
						...
					]
				},
				...
			]
		}
	],
	"dim3":[
		{
			"id":1,
			"label":"All Languages",
			"xref":null,
			"childListItems":[
				{
					"id":4,
					"label":"Afghan/Pashtu",
					"xref":null
				},
				{
					"id":2,
					"label":"Afrikaans",
					"xref":null
				},
				...
			]
		}
	],
	"dim4":[
		...
	]
}