Persistence not stored as json in DB

Hi, I am learning Orleans I have just created the sample provided in the docs. I found in the docs that UseJson is the default now. But still, the grains are stored as binary in the database.

I am attaching the code zip file below for you to look over.

OrleansURLShortener.zip

NOTE:- Tried a lot to get any information from the document, but I guess the document is not complete or missing the updates.