Python-With-Gtk-Template/user_config/usr/share/app_name/contexct_menu.json

{
    "Open Actions": {
        "Open":      ["STOCK_OPEN", "open"],
        "Open With": ["STOCK_OPEN", "open_with"],
        "Execute":   ["STOCK_EXECUTE", "execute"],
        "Execute in Terminal": ["STOCK_EXECUTE", "execute_in_terminal"]
    },
    "File Actions": {
        "New":       ["STOCK_ADD", "create"],
        "Rename":    ["STOCK_EDIT", "rename"],
        "Cut":       ["STOCK_CUT", "cut"],
        "Copy":      ["STOCK_COPY", "copy"],
        "Paste":     ["STOCK_PASTE", "paste"]
    },
    "Plugins": {}
}