Activities are communicative objects. e.g, Notes and Emails. The following endpoints can be used to retrieve, create and update activities.

TYPE	RESOURCE	DESCRIPTION
GET	/activities	List activities.
GET	/activities/count	Total number of activities.
GET	/activities/:id	Specific activity identified by its id.
GET	/activities/:id/interacts	Recipients against a given activity.
GET	/activities/:id/interacts/count	Count the number of recipients against an activity.
GET	/activities/allocations	Allocation (billable & non-billable) information for a selected group of activities.
POST	/activities	Create a new activity.
PUT	/activities/:id	Update an activity.
DELETE	/activities/:id	Remove an activity.