从在线json获取哈希图

So I've got a link to a json (see image) but I'm trying to get all the data in 'stats' into a HashMap but I can't get it to work. I've tried to mess around with org.json:json but in the end it all comes out a bit dodgy. This is my first time working with json so I'm not sure what I'm doing. I want to ignore everything but the entires in 'stats' so how could I do this?

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