Update/create an asset family

curl --location --request PATCH '/api/rest/v1/asset-families/' \
--header 'Content-Type: application/json' \
--data-raw '{
    "attribute_as_main_media": "main_image",
    "code": "model_pictures",
    "labels": {
        "en_US": "Model pictures",
        "fr_FR": "Photographies en pied"
    },
    "naming_convention": {
        "abort_asset_creation_on_error": true,
        "pattern": "/(?P<product_ref>.*)-.*/",
        "source": {
            "channel": null,
            "locale": null,
            "property": "code"
        }
    },
    "product_link_rules": [
        {
            "assign_assets_to": [
                {
                    "attribute": "model_pictures",
                    "mode": "replace"
                }
            ],
            "product_selections": [
                {
                    "field": "sku",
                    "operator": "EQUALS",
                    "value": "{{product_ref}}"
                }
            ]
        }
    ],
    "transformations": [
        {
            "filename_suffix": "_thumbnailBW",
            "label": "Thumbnail plus black and white transformation",
            "operations": [
                {
                    "parameters": {
                        "height": 150,
                        "width": 150
                    },
                    "type": "thumbnail"
                },
                {
                    "parameters": {
                        "colorspace": "grey"
                    },
                    "type": "colorspace"
                }
            ],
            "source": {
                "attribute": "main_image",
                "channel": null,
                "locale": null
            },
            "target": {
                "attribute": "thumbnail",
                "channel": null,
                "locale": null
            }
        }
    ]
}'