sahara/api-ref/source/v1.1/samples/clusters/cluster-scale-request.json

{
    "add_node_groups": [
        {
            "count": 1,
            "name": "b-worker",
            "node_group_template_id": "bc270ffe-a086-4eeb-9baa-2f5a73504622"
        }
    ],
    "resize_node_groups": [
        {
            "count": 4,
            "name": "worker"
        }
    ]
}