cinder/api-ref/source/v3/samples/group-type-create-request.json

{
    "group_type": {
        "name": "grp-type-001",
        "description": "group type 0001",
        "is_public": true,
        "group_specs": {
            "consistent_group_snapshot_enabled": "<is> False"
        }
    }
}