Hi I have a 2008 Versa which I purchased as used dealer demo in spring 2009. In the fall of that year I had a lot of squealing noise from the rear drums/shoes. Turns out it was the type of shoes that Nissan was providing at the time that caused the noise. They were not low in thickness. The materials used in some types of cheaper pads/shoes can promote more noise. Nissan changed the shoes for me under warranty with a different oem set that solved the problem. I believe there was even a TSB out on this as well.
In your case, could be something similar in the composite materials making up the shoes. I know in the mornings or sometimes after sitting for awhile in damp weather, there is a bit of rust build up which wears off quickly and can promote some noise.
My opinion is if the shoes are not low and triggering a wear indicator, the drums are not warped and you are off warranty, you may want to replace with Nissan-approved shoes. Going with cheaper aftermarket/non-oem shoes may not solve the noise issue. It's all about the composite materials in the shoes/pads.
Just my 2 cents worth.