# WorkItemTypeActivityItem

Represents a change in the
`type`
attribute of the work item.
Extends [MultiValueActivityItem](api-entity-MultiValueActivityItem.html)

## Attributes

This table describes attributes of the `WorkItemTypeActivityItem` entity.

* To receive an attribute in the response from the server, specify it explicitly in the `fields` request parameter.

* To update an attribute, provide it in the body of a POST request.

|  Field  |  Type  |  Description  |
| --- | --- | --- |
|  id  |  String  |  The ID of the change in the `type` attribute of the work item. `Read-only`.  |
|  target  |  [IssueWorkItem](api-entity-IssueWorkItem.html)  |  The entity that is the target of the performed action. `Read-only`.  |
|  removed  |  [Array of WorkItemTypes](api-entity-WorkItemType.html)  |  List of removed types in the work item. `Read-only`.  |
|  added  |  [Array of WorkItemTypes](api-entity-WorkItemType.html)  |  List of added types in the work item. `Read-only`.  |
|  author  |  [User](api-entity-User.html)  |  The user who performed the action. `Read-only`.  |
|  category  |  [ActivityCategory](api-entity-ActivityCategory.html)  |  The category of the activity. `Read-only`.  |
|  field  |  [FilterField](api-entity-FilterField.html)  |  The filter field. It contains the additional information about the modified property in the target entity. For example, the information about a link type, or the type of the modified custom field or bundle, and so on. `Read-only`. `Can be null`.  |
|  targetMember  |  String  |  The name of the property of the target entity, which was modified. `Read-only`. `Can be null`.  |
|  timestamp  |  Long  |  The timestamp of the activity event. Stored as a unix timestamp at UTC. `Read-only`.  |