| Connected account | The connected account to use for the request | Connected Account | Yes | |
| Activity ID | ID of the activity to update | Number | Yes | |
| Deal ID | ID of the deal this activity will be associated with | Number | No | |
| Due date | Due Date to activity be done YYYY-MM-DD | Datetime | No | |
| Done | Whether the activity is done or not | Predefined Choice List | No | |
| Note | Note of the activity (HTML format) | Text (Long) | No | |
| Organization ID | ID of the organization this activity will be associated with | Text (Short) | No | |
| Person ID | ID of the person this activity will be associated with | Number | No | |
| Subject | The subject of the activity | Text (Short) | No | |
| Type | Type of the activity like "call", "meeting", etc | Text (Short) | No | |
| User ID | ID of the active user whom the activity will be assigned to. If omitted, the activity will be assigned to the authorized user | Text (Short) | No | |
| Custom property 1 name | Name of the property to set | Text (Short) | No | |
| Custom property 1 value | Value of the property to set | Text (Long) | No | |
| Custom property 2 name | Name of the property to set | Text (Short) | No | |
| Custom property 2 value | Value of the property to set | Text (Long) | No | |
| Custom property 3 name | Name of the property to set | Text (Short) | No | |
| Custom property 3 value | Value of the property to set | Text (Long) | No | |
| Encode properties? | By default do custom properties have to be set as ID instead of their actual name. Also option fields have to be set as ID instead of their actual value. If this option gets set they get automatically encoded | True/False | No | |