If a class is properly encapsulated it's hard to tell if it even has fields from outside.
Some classes are immutable. You can't change their fields once their objects are constructed. Your class is also immutable. But not only can't its object change, you only have one way to build it.
That doesn't mean you have to think of the whole thing as a verb. It can still be a noun. It's just a noun that comes in only one flavor.
What you have is a bag of functions that move around together. If your class is properly designed those functions have something to do with each other. That single unifying idea that brought them together should give the class it's name. The name should make clear what functions belong in the class and what functions don't. If people read the name and then are surprised by what they find inside then you have a bad name.
Your idea seems to be about Persistence. That's a fine noun.