| id | The activity id. | 
| case_id | The case id of the activity. | 
| type_id | The activity type id. | 
| type | The display name of the activity type. | 
| type_icon | The icon of the activity type. | 
| contact_id | The contact id of the activity. | 
| contact | The contact name of the activity. | 
| contact_email | The contact email address. | 
| time_spent | Time spent on the activity in minutes. | 
| subject | The subject of the activity if an incoming email. | 
| public | Is the activity publicly view-able in the communities. | 
| important | Important flag is set. | 
| logs | logs flag is set. | 
| solution | solution flag is set. | 
| email_from | The from address of the the incoming email if the activity was one. | 
| email_to | The to addresses of the incoming / outgoing email. | 
| email_cc | The cc addresses of the incoming / outgoing email. | 
| content | The activity content as HTML. | 
| content_plaintext | The activity content with no HTML. | 
| content_last_reply | Return only the content of the created activity with no email chain (if applicable). | 
| createdby_id | The agent id who created the activity if created by one. | 
| createdby | The agent name who created the activity if created by one. | 
| created | The date the activity was created in UTC. | 
| created_unix | The date the activity was created as a time stamp. | 
| created_ago | The date the activity was created in a friendly time. | 
| due | The date the activity was is due on in UTC. Only used for tasks. | 
| due_unix | The date the activity was is due on in UTC as a UNIX time stamp. Only used for tasks. | 
| due_ago | The date the activity was is due on in UTC in a friendly format. Only used for tasks. | 
| completed_on | The date the activity was completed on in UTC.  Only used for tasks. | 
| completed_on_unix | The date the activity was completed on in UTC as a UNIX time stamp. Only used for tasks. | 
| completed_on_ago | The date the activity was completed on in UTC in a friendly format. Only used for tasks. | 
| response_time | The response time from the last activity. | 
| sla_response_time | The SLA response time if there was an SLA set on the case. | 
| sla_response_time_expected | The SLA response time that was expected on this activity. | 
| attachments | An array of attachments linked to this activity.  Please see the attachment object in the next section. |