curl --request POST \
  --url 'https://api.flashcat.cloud/incident/post-mortem/template/upsert?app_key=' \
  --header 'Content-Type: application/json' \
  --data '
{
  "team_id": 2477033058131,
  "name": "Production incident template",
  "description": "Template for production incident reviews.",
  "content": "[{\"type\":\"heading\",\"content\":\"Summary\"}]",
  "content_markdown": "## Summary\nDescribe what happened."
}
'

{
  "request_id": "01HK8XQE3Z7JM2NTFQ5YJ8P9R4",
  "data": {
    "account_id": 2451002751131,
    "template_id": "post_mortem_default_tmpl_en-us",
    "name": "Default post-mortem report",
    "description": "Default sections for post-mortem reports.",
    "content": "[{\"type\":\"heading\",\"content\":\"Summary\"}]",
    "content_markdown": "## Summary\nDescribe what happened.",
    "team_id": 2477033058131,
    "created_at_seconds": 1773900000,
    "updated_at_seconds": 1773903600
  }
}