Sub-tasks creation for existing issue

Use Case: Apply template to an existing issue. Create QA sub-tasks on User Story transition

Automation Trigger: Work Item Transition

Prepare the Template, enable Automation, and prepare the payload using Payload Builder:
1. Choose “Apply Templates” as the operation
2. Select “Create Children Only”
Create Automation Rule
1. Trigger: Work Item Transition
  1. From: In Progress
  2. To: Done
2. Condition applied: Issue Type equals “Story”
3. Action: Send Web Request
4. Use Web Request URL specified in the Template’s automation settings
5. HTTP method: POST
6. Web Request Body: Custom Data
7. Use Payload as Custom data copied from the Template’s automation settings
8. Save and Enable Automation Rule
  Code:
  JSON
```
{
  "operation": "apply-template",
  "issueId": "{{issue.id}}",
  "createChildrenOnly": true
}
```
Test Automation Rule: once user story transitioned to “Done” - set of subtasks created 🎉