qmk_firmware/keyboards/primekb/prime_e/rgb/info.json

{
    "keyboard_name": "Prime_E RGB",
    "usb": {
        "pid": "0x0052",
        "device_version": "0.0.1"
    },
    "rgblight": {
        "led_count": 8
    },
    "ws2812": {
        "pin": "B7"
    }
}