```bash
curl -X PUT http://localhost:6333/collections/{collection_name} \
  -H 'Content-Type: application/json' \
  --data-raw '{
    "vectors": {
      "size": 300,
      "distance": "Cosine"
    },
    "metadata": {
      "my-metadata-field": "value-1",
      "another-field": 123
    }
  }'
```