picard/test/data/ws_data/label_info_null.json

{
    "releases": [
        {
            "label-info": [
                {
                    "catalog-number": null,
                    "label": {
                        "disambiguation": null,
                        "label-code": null,
                        "sort-name": null,
                        "name": null,
                        "id": null
                    }
                }
            ]
        }
    ]
}