Parameter	Mandatory	Description	Examples	More Info
API	Yes	The API area	acthistory.json
General	Yes	Parameters described in API syntax section		Structure of an API call
Model Structure	Yes	Name of model required	modelstructure=activityhistorylist	Using data models
Company	Yes	The company number	company=1
Identifier	No	Activty ID or UUID	activtyid=3818

Example request:

http://<SERVER>/jsonapi/acthistory.json?&user=user&password=user&version=4&activityid=8951&modelstructure=activityhistorylist

Example response:

{
  "responsecode": 1,
  "responsestatus": "OK",
  "errorcode": 0,
  "errormessage": "",
  "totalrows": 3,
  "totalpages": 1,
  "responsemessage": "",
  "pagerows": 0,
  "pagenumber": 1,
  "success": true,
  "data": [
    {
      "activityhistoryUuid": "EB8EB45C72C39F468BB4EE69ABB323F0",
      "activityhistoryTimeStampModified": 1578507631,
      "activityhistoryRecordVersionNumber": 0,
      "activityhistoryNotesID": 8951,
      "activityhistoryNotesHistoryID": 12412,
      "activityhistoryDateCreated": "2020-01-08",
      "activityhistoryTimeCreated": "18:20:31",
      "activityhistoryHistoryDetail": "Mike, here is an example of the problem",
      "activityhistoryComment": "",
      "activityhistoryCreatedByUserID": 54,
      "activityhistoryCreatedByFullNAme": "User - Andy"
    },
    {
      "activityhistoryUuid": "F4B20E2633FEB744982200F220B85BDE",
      "activityhistoryTimeStampModified": 1578509276,
      "activityhistoryRecordVersionNumber": 0,
      "activityhistoryNotesID": 8951,
      "activityhistoryNotesHistoryID": 12413,
      "activityhistoryDateCreated": "2020-01-08",
      "activityhistoryTimeCreated": "18:47:56",
      "activityhistoryHistoryDetail": "Transferred to Mike Notpalmer for actioning",
      "activityhistoryComment": "",
      "activityhistoryCreatedByUserID": 5,
      "activityhistoryCreatedByFullNAme": "Mike Pender"
    }
  ]
}

Note: Feature from API 2.2