annotations.jsonfile containing your annotations. You can paste its content in JSONLint to make it more human readable. In this case, you will get something like below (indented differently).
minX, maxX, minY, maxYvalues. Since it can be useful to have a reference of the config that was used while annotating, the config is prepended before all images annotations. We only have one image ("chill-boss-cat.jpg"), one type of annotation ("bbox"), and one annotation here but the syntax support many of each.