chromium/chrome/test/data/extensions/api_test/keybinding/update/v1_upgrade_browser_action/manifest.json

{
  "name": "A browser action command to test if upgrading from MV2 to MV3 succeeds. (MV2)",
  "version": "1.0",
  "manifest_version": 2,
  "commands": {
    "_execute_browser_action": {
      "suggested_key": "Alt+N"
    }
  },
  "browser_action": {}
}