$ curl -X GET "http://localhost:9200/data/_search?pretty" -H 'Content-Type: application/json' -d'
{
  "size": 1,
  "query": {
    "function_score": {
      "random_score": {}
    }
  }
}'

{
  "took": 10,
  "timed_out": false,
  "_shards": {
    "total": 5,
    "successful": 5,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": {
      "value": 100,
      "relation": "eq"
    },
    "max_score": 0.12345,
    "hits": [
      {
        "_index": "data",
        "_type": "_doc",
        "_id": "abc123",
        "_score": 0.12345,
        "_source": {
          "user": "john_doe",
          "message": "Hello, world!"
        }
      }
    ]
  }
}