curl -XPUT "http://localhost:9200/index" -d'
{
   "mappings": {
      "_default_": {
         "dynamic_templates": [
            {
               "test": {
                  "match_mapping_type": "string",
                  "match": "*", // <- not needed when we have 'match_mapping_type'
                  "mapping": {
                      "index": "not_analyzed"
                  }
               }
            }
         ]
      }
   }
}'

{
   "error": "MapperParsingException[mapping [_default_]]; nested: MapperParsingException[template must have match or path_match set]; ",
   "status": 400
}