将键值对的字符串转换为JSON字符串的惯用法（Scala）

I'm trying to convert a string of key value pairs to a JSON string. The only thing I know about the string of KV pairs is the format of the string i.e. space seperated, comma seperated etc.. For e.g. I don't control over the number or type of the keys coming in as input. I'm trying to convert a string of key value pai