Update

Activity update

Parameter	Description	Example	More info
API	The API area	activities.json
Action	The action to perform	action=update
	Parameters described in overview	user=user&password=user	v3.3 Overview
input	Pass activity ID, then name/value pairs	"data": [<see example>]
Response	Returned data	See below

Example request:

http://<SERVER>/jsonapi/activities.json?company=1&user=user&password=user&version=3.3&action=update&input={
  "data": [
    {
      "activityID": 6958,
      "activityDetails": "Meeting at Boundry Mill",
      "activityCustomField300": "MyText"
     }
  ]
}

Example response:

{
  "responsecode": 1,
  "responsestatus": "OK",
  "errorcode": 0,
  "errormessage": "",
  "responsemessage": "data processed successfully.",
  "warningmessage": "",
  "success": true,
  "data": [
    {
      "activityID": 6740,
      "activityuuid": "6372D5630F00DD43AB3C7DFDE1A114D4",
      "activityTimeStampModified": 1458754056,
      "activityRecordVersionNumber": 6
    }
  ]
}

Note:

To discover which fields are editable make a call to the "Activity details" endpoint and specify '&style=modelstructure' see Meta-data