How Gutenberg works witihin.

gutenberg-internal.js

{
	"name": "core/paragraph",
	"attributes": {
		"className": "my-text",
		"content": {
			"formats": (23) [empty × 6, Array(1), Array(1), Array(1), Array(1), Array(1), Array(1), empty, Array(1), Array(1), Array(1), Array(1), Array(1), Array(1), Array(1), Array(1), Array(1), empty]
			"replacements": (23) [empty × 23]
			"text": "Hello World! Read more."
		},
		"dropCap": false
	},
}