If you need the audit log information as a JSON you can use the next URL:
GET api/enterprise/process-instances/{process-instance-id}/audit-log
Response
200 Ok
Returns a JSON string representing the full audit log for the requested process instance. For example:
{ "processInstanceId": "5", "processInstanceName": "myProcessInstance", "processDefinitionName": "TEST decision process", "processDefinitionVersion": "1", "processInstanceStartTime": "Wed Jan 20 16:18:46 EET 2016", "processInstanceEndTime": null, "processInstanceInitiator": "Mr Activiti", "entries": [ { "index": 1, "type": "startForm", "timestamp": "Wed Jan 20 16:18:46 EET 2016", "selectedOutcome": null, "formData": [ { "fieldName": "Text1", "fieldId": "text1", "value": "TEST" } ], "taskName": null, "taskAssignee": null, "activityId": null, "activityName": null, "activityType": null "startTime": "Thu Feb 16 16:32:05 GMT 2017", "endTime": "Thu Feb 16 16:32:05 GMT 2017", "durationInMillis": 1 }, { "index": 2, "type": "activityExecuted", "timestamp": "Wed Jan 20 16:18:46 EET 2016", "selectedOutcome": null, "formData": [], "taskName": null, "taskAssignee": null, "activityId": "startEvent1", "activityName": "", "activityType": "startEvent" "startTime": "Thu Feb 16 16:32:05 GMT 2017", "endTime": "Thu Feb 16 16:32:09 GMT 2017", "durationInMillis": 24054 }, { "index": 3, "type": "activityExecuted", "timestamp": "Wed Jan 20 16:18:47 EET 2016", "selectedOutcome": null, "formData": [], "taskName": null, "taskAssignee": null, "activityId": "sid-15E18ED8-252F-4A24-9E93-68F53FE28535", "activityName": "", "activityType": "serviceTask" "startTime": "Thu Feb 16 16:32:05 GMT 2017", "endTime": "Thu Feb 16 16:32:09 GMT 2017", "durationInMillis": 24054 }, { "index": 4, "type": "activityExecuted", "timestamp": "Wed Jan 20 16:18:48 EET 2016", "selectedOutcome": null, "formData": [], "taskName": null, "taskAssignee": null, "activityId": "sid-001FD811-C171-40E3-9C62-602621672022", "activityName": "", "activityType": "userTask" "startTime": "Thu Feb 16 16:32:05 GMT 2017", "endTime": "Thu Feb 16 16:32:09 GMT 2017", "durationInMillis": 24054 }, { "index": 5, "type": "taskCreated", "timestamp": "Wed Jan 20 16:18:48 EET 2016", "selectedOutcome": null, "formData": [], "taskName": null, "taskAssignee": "Mr Activiti", "activityId": null, "activityName": null, "activityType": null "startTime": "Thu Feb 16 16:32:05 GMT 2017", "endTime": "Thu Feb 16 16:32:09 GMT 2017", "durationInMillis": 24054 } ], "decisionInfo": { "calculatedValues": [ { "name": "outputVariable1", "value": "1.0" } ], "appliedRules": [ { "title": "Rule 1 (TEST Decision Table 1)", "expressions": [ { "type": "CONDITION", "variable": "text1", "value": "== 'TEST'" }, { "type": "OUTCOME", "variable": "outputVariable1", "value": "1" } ] } ] } }