qmk_firmware/keyboards/mlego/m60_split/rev1/info.json

{
    "usb": {
        "pid": "0x6361",
        "device_version": "0.0.1"
    },
    "split": {
        "bootmagic": {
            "matrix": [5, 0]
        }
    },
    "processor": "STM32F401",
    "bootloader": "tinyuf2",
    "board": "BLACKPILL_STM32_F401"
}