curl --request GET \
  --url https://api.mixpeek.com/v1/namespaces/{namespace_identifier}

{
  "namespace_id": "<string>",
  "namespace_name": "spotify_playlists_dev",
  "description": "<string>",
  "feature_extractors": [
    {
      "feature_extractor_name": "<string>",
      "version": "<string>",
      "feature_extractor_id": "<string>"
    }
  ],
  "payload_indexes": [
    {
      "field_name": "<string>",
      "type": "keyword",
      "field_schema": {
        "type": "text",
        "tokenizer": "word",
        "min_token_len": 2,
        "max_token_len": 15,
        "lowercase": true
      }
    }
  ]
}