New modular machines structure format

{
    "blocks": [
        [
            "FFFF",
            "FVVF",
            "FVVF",
            "FFFF"
        ],
        [
            "FVVF",
            "VCCV",
            "VCCV",
            "FVVF"
        ],
        [
            "FVVF",
            "VCCV",
            "VCCV",
            "FVVF"
        ],
        [
            "FFFF",
            "FVVF",
            "FVVF",
            "FFFF"
        ]
    ],
    "block_map": {
        "F": {
            "block": "appliedenergistcs:frame"
        },
        "V": {
            "block": "appliedenergistics:vent",
            "properties": {
                "variant": "normal_vent"
            }
        },
        "C": {
            "block": "appliedenergistics:crafting_core"
        }
    }
}