curl --request GET \
  --url http://0.0.0.0:3000/v1/devices/with-entities \
  --header 'Authorization: Bearer <token>'

[
  {
    "device": {
      "id": 123,
      "name": "<string>",
      "manufacturer": "<string>",
      "model": "<string>",
      "config_entry_id": 123,
      "user_id": "<string>"
    },
    "entities": [
      {
        "id": 123,
        "entity_id": "<string>",
        "name": "<string>",
        "domain": "<string>",
        "platform": "<string>",
        "unique_id": "<string>",
        "config_entry_id": 123,
        "device_registry_id": 123
      }
    ]
  }
]