Twitter entities object

For Activity streams format, the twitter_entities is the same format and data dictionary shown on the native enriched format entities object here.

Example:

      "twitter_entities": {
	"hashtags": [{
		"text": "TwitterAPI",
		"indices": [
			228,
			239
		]
	}],
	"urls": [{
		"url": "https://t.co/r6z6CI7kEy",
		"expanded_url": "https://twittercommunity.com/t/retiring-labs-v2-recent-search-and-hide-replies/145795",
		"display_url": "twittercommunity.com/t/retiring-lab…",
		"indices": [
			250,
			273
		]
	}],
	"user_mentions": [],
	"symbols": []
}