callback({ "resource_url": "http://wedata.net/databases/iOffer", "created_by": "howandwho", "required_keys": "url nextLink pageElement", "description": "", "name": "iOffer", "updated_at": "2016-05-12T06:30:32+09:00", "created_at": "2016-05-12T06:26:45+09:00", "optional_keys": "exampleUrl insertBefore", "permit_other_keys": true })