JSON对象和JSON文档之间有什么区别？

I'm working with some data in React/Flux/Prismic. When I get it back from the API it comes through as what looks like a json object, but the console says its a "Document". Then when I get the data from my Flux store, it apparently goes through a change because the console now logs it as an "Object". The two look identical. What is the difference? See a screencap below. I'm working with some data in React/Flux/Prismi