Karabiner-elements: remaping Fn keys to left command key, not working

[chaucy]

How to set fn key (function key) to command key??
I have typed the following code in karabiner.json but it's not work:

{
    "profiles": [
        {
            "name": "Default profile",
            "selected": true,
            "simple_modifications": {
                “fn”: “left_command”
            }
        }
    ]
}

[chaucy]

I try type the code again and it works

{
    "profiles": [
        {
            "name": "Default profile",
            "selected": true,
            "simple_modifications": {
                "fn": "left_command"
            }
        }
    ]
}

[thecotne]

@chaucy you have wrong characters in first example this “ is not same as this "

[seangaffney]

Please consider closing this issue if resolved. Thanks!