Asset Request Object

The main container object for each asset requested or supported by Exchange on behalf of the rendering client. Any object that is required is to be flagged as such. Only one of the {title,img,video,data} objects should be present in each object. All others should be null/absent. The id is to be unique within the AssetObject array so that the response can be aligned.
To be more explicit, it is the ID of each asset object that maps the response to the request. So if a request for a title object is sent with id 1, then the response containing the title should have an id of 1.

Field	Scope	Type	Description
id	required	int	Unique asset ID, assigned by exchange. Typically a counter for the array.
required	optional	int	Set to 1 if asset is required.
title	recommended	object	Title object for title assets. See TitleObject definition.
img	recommended	object	Image object for image assets. See ImageObject definition.
video	optional	object	Video object for video assets. See the Video request object definition. Note that in-stream (ie preroll, etc) video ads are not part of Native. Native ads may contain a video as the ad creative itself.
data	recommended	object	Data object for brand name, description, ratings, prices etc. See DataObject definition