Example thesis CSL json for adding to CSL visual editor BAsed on https://github.com/citation-style-language/csl-editor/blob/master/src/exampleData.js#L421-L456

csl-data.json

{
	"type": "thesis",
	"title": "This is a test thesis",
	"publisher": "University of Leeds",
	"publisher-place": "Leeds, UK",
	"genre": "Doctoral thesis",
	"source": "test.repository.leeds.ac.uk",
	"abstract": "The abstract of the thesis.",
	"URL": "https://test.repository.leeds.ac.uk/123456/",
	"language": "en",
	"author": [
		{
			"family": "Bos",
			"given": "R.A"
		}
	],
	"issued": {
		"date-parts": [
			[
				"2021",
				12,
				25
			]
		]
	},
	"accessed": {
		"date-parts": [
			[
				"2021",
				12,
				25
			]
		]
	}
}