I concur with Kurt. There are quite a few "alleni" lurking around the pet trade. In my opinion Ranids, especially large Ranids, make awful captives, but they are certainly not impossible. Definitely a large aquaterrarium with sufficient cover on land and in the water, as well as appropriate temperatures. For relatively "unknown" frogs like this, your best bet is to research their natural history to get a sense for habitat construction and temperature, as well as food.

Best,
Alex