remapping cmd+space to right command using karabiner-elements

karabiner.json

// REMAPPING CMD+SPACE TO RIGHT COMMAND USING https://github.com/tekezo/Karabiner-Elements
// Put following code into rules section into ~/.config/karabiner/karabiner.json file
// "profiles": [
// ... 
"rules": [
    {
        "description": "RightCommand to Switch Input Source",
        "manipulators": [
            {
                "conditions": [
                    {
                        "type": "input_source_if",
                        "input_sources": [
                            {
                                "language": "en"
                            }
                        ]
                    }
                ],
                "type": "basic",
                "from": {
                    "key_code": "right_command",
                    "modifiers": {
                        "optional": [
                            "any"
                        ]
                    }
                },
                "to": [
                    {
                        "key_code": "right_command"
                    }
                ],
                "to_if_alone": [
                    {
                        "select_input_source": {
                            "input_source_id": "com.apple.keylayout.Russian"
                        }
                    }
                ]
            },
            {
                "conditions": [
                    {
                        "type": "input_source_unless",
                        "input_sources": [
                            {
                                "language": "en"
                            }
                        ]
                    }
                ],
                "type": "basic",
                "from": {
                    "key_code": "right_command",
                    "modifiers": {
                        "optional": [
                            "any"
                        ]
                    }
                },
                "to": [
                    {
                        "key_code": "right_command"
                    }
                ],
                "to_if_alone": [
                    {
                        "select_input_source": {
                            "input_source_id": "com.apple.keylayout.US"
                        }
                    }
                ]
            }
        ]
    }
]