sudo cat /etc/shadow | rjc shadow

{
    "resources": [
        {
            "username":     String,
            "password":     String,
            "last_changed": i32,
            "minimum":      i32,
            "maximum":      i32,
            "warn":         i32,
            "inactive":     Option<i32>,
            "expire":       Option<i32>,
        }

        ...
    ]
}

$ sudo cat /etc/shadow | rjc -o=pretty shadow
{
    "resources": [
        {
            "username": "root",
            "password": "*",
            "last_changed": 18113,
            "minimum": 0,
            "maximum": 99999,
            "warn": 7,
            "inactive": null,
            "expire": null
        },
        ...
    ]
}