Karabiner-Elements configuration

my_confs.json

{
  "title": "my confs",
  "description": "karabiner is god",
  "rules": [
    {
      "description": "ctrl-m to enter",
      "manipulators": [
        {
          "type": "basic",
          "from": {
              "key_code": "m",
              "modifiers": {
                  "mandatory": [
                      "control"
                  ],
                  "optional": []
              }
          },
          "to": [
              {
                  "key_code": "return_or_enter"
              }
          ]
        }
      ]
    }
  ]
}