qmk_firmware/keyboards/handwired/onekey/keymaps/default_json/keymap.json

{
    "keyboard": "handwired/onekey/pytest",
    "keymap": "default_json",
    "layout": "LAYOUT_ortho_1x1",
    "layers": [["KC_A"]],
    "author": "qmk",
    "notes": "This file is a keymap.json file for handwired/onekey/pytest",
    "version": 1
}