I don't have reliable information about a music artist named "Sandrayati" in my training data. To write an accurate biography for your merchandise store, I'd recommend:
1. Checking the artist's official website or social media profiles
2. Looking at their music streaming platform bios (Spotify, Apple Music, etc.)
3. Contacting the artist directly for official biographical information
This will ensure the biography is accurate and approved by the artist themselves.
