curl --request POST \
  --url https://api.rigbox.dev/api/apps/{id}/log-sources \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "source_ref": "<string>",
  "source_type": "<string>",
  "display_name": "<string>",
  "is_primary": true
}
'

{
  "source": {
    "app_id": "<string>",
    "created_at": "2023-11-07T05:31:56Z",
    "id": "<string>",
    "is_primary": true,
    "source_ref": "<string>",
    "source_type": "systemd_unit",
    "updated_at": "2023-11-07T05:31:56Z",
    "display_name": "<string>"
  }
}