curl --request PUT \
  --url https://api.icepanel.io/v1/landscapes/{landscapeId}/versions/{versionId}/diagrams/{diagramId}/content \
  --header 'Authorization: <authorization>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "comments": {},
  "commit": 123,
  "connections": {},
  "objects": {}
}
'

{
  "diagramContent": {
    "comments": {},
    "commit": 123,
    "connections": {},
    "objects": {},
    "createdAt": "2023-11-07T05:31:56Z",
    "createdBy": "user",
    "createdById": "<string>",
    "groupId": "<string>",
    "handleId": "<string>",
    "id": "<string>",
    "landscapeId": "<string>",
    "modelId": "<string>",
    "name": "<string>",
    "status": "current",
    "type": "app-diagram",
    "updatedAt": "2023-11-07T05:31:56Z",
    "updatedBy": "user",
    "updatedById": "<string>",
    "version": 123,
    "versionId": "<string>",
    "deletedAt": "2023-11-07T05:31:56Z",
    "deletedBy": "user",
    "deletedById": "<string>",
    "latestEntityId": "<string>",
    "viewedAt": "2023-11-07T05:31:56Z",
    "viewedBy": "user",
    "viewedById": "<string>"
  }
}