我想要（像）这样的东西。
I 是主语“我”，want为及物动词“想要”，something是代词做宾语；“just”在句中表强调；
“just like this”是something的从句，意为“就像这样的”。
相关例句：
Data Visualization is just something like this. 原来资讯视觉化就是这么一回事。
Just knew something like this would happen. 我就知道会发生这样的事
Why would you need something like this？为什么需要这样的元素呢？
Where does one even get something like this? 从哪里翻出这么一件？
I hope more campaigns do something like this. 我希望有更多的竞选组织这样做"。