How to access request body from controllers?

I am new with Strapi. It’s an amazing software, thanks a lot.

However, I have a question on how to access request body from controllers? I tried ctx.request.body
but it’s just an empty object {} no matter what I sent via postman (Body → raw (JSON)).

Also, is this how I should access the request body in the first place? I am just trying to manipulate the response a little bit depending on the request body.

Thanks.

Did you settled up some Strapi Middleware?