If you have a recognized degree and experience, I'd say it's quite a medium salary, however if your needs aren't high, it could be quite sufficient.
I know most expats opt for a condo
, pool, maid and frequent trips home, but if you can survive renting a common room in HDB (around 600-700$), eat cheap and keep your shopping moderate (something around 700$.. sounds harsh, but it is doable), use public transport, and cut on phone bills, you will be able to save quite a nice sum monthly. Also check how much tax would you be paying.
If you don't want to save money, and are on your own, I'd say you could afford a moderately comfortable life. But, as I said, it's all about the needs.