Creates a Catalog Entity

curl --request POST \
  --url https://api.rootly.com/v1/catalogs/{catalog_id}/entities \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/vnd.api+json' \
  --data '{
  "data": {
    "type": "catalog_entities",
    "attributes": {
      "name": "<string>",
      "description": "<string>",
      "position": 123
    }
  }
}'

{
  "data": {
    "id": "d38c131b-1e66-415d-9b97-e548a996faa0",
    "type": "catalog_entities",
    "attributes": {
      "catalog_id": "42c6f9e5-55da-407a-8bf3-e64f901a43a7",
      "name": "Test Item",
      "slug": "test-item",
      "position": 2,
      "deleted_at": null,
      "updated_at": "2025-09-15T14:57:16.247-07:00",
      "created_at": "2025-09-15T14:57:16.247-07:00"
    },
    "relationships": {
      "catalog": {
        "data": {
          "id": "42c6f9e5-55da-407a-8bf3-e64f901a43a7",
          "type": "catalogs"
        }
      },
      "properties": {
        "data": []
      }
    }
  }
}