Creates a gift.
Gift Id (passed as ?gift parameter in claim link)
UTC timestamp when gift was created
UTC timestamp when gift was claimed
1823.html (string) - Path portion of URL gift will allow access to
ID of cross-device session of claiming user (if claimed)
OK
{"id": "58c3852bb23f3467","created": "2018-04-27T09:15:28Z","uri": "/news/local/story"}