Entity representing an
actionLink that is included in an OpenSocial 2.5
extension to the activitystrea.ms specification.
See the Open Social specification.
Hint that MAY be used by the presentation layer to allow interaction with the user (for example, the label text for a button).
HTTP operation to perform against the actionable resource. Should be one of
URI representing the target web hook endpoint to be invoked with the specified HTTP verb.