There isn’t an “official” one. The sigils that come from the grimoiric tradition don’t cover every entity in existence, and this goddess is from a completely different culture.
There’s no such thing as official sigils, there’s only older ones and newer one, maybe ones that people have used a lot and vouch for because they are listed in well known grimoires.
In the end, the sigil you personally use, is the one that will work for you… because you used it. It doesn’t matter what it is as long as you do the work.
Here’s some - use the ones you like the best, that’s your intuition telling you what to do - trust yourself, not others.