websocket aggregate buy and sell

hello , i want to ask about buy and sell data in aggregate websocket

how to knew if its buy trade or its sell trade ? i try so hard to understand this but i didnt

and how to know if its sell or buy trade !? for example this trade its sell or buy trade ?

the maker is for this propose. In this case when it is false, that means the buyer is not the market maker.

so its sell trade right ?