Represents a reference to a Challenge, which for now is just an Objective.
Type: object
Object Properties
Mapped to Definition
The hash for the Objective that matches this challenge. Use it to look up the DestinyObjectiveDefinition.
Type: uint32
Mapped to Manifest Database Definition: Destiny.Definitions.DestinyObjectiveDefinition
The rewards as they're represented in the UI. Note that they generally link to "dummy" items that give a summary of rewards rather than direct, real items themselves.

If the quantity is 0, don't show the quantity.
Type: array
Array Contents: Destiny.DestinyItemQuantity