title: Elastic search 5.3 create index with one shard
body: <p>I am trying to create an index with only one shard from windows os. I'ge got the code from the <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-create-index.html" rel="nofollow noreferrer">elastic website</a> I've changed only the simple quote to double and 3 to one and my curl looks like this:  curl -XPUT "localhost:9200/twitter?pretty" -H "Content-Type: application/json" -d {"settings":{"index":{"number_of_shards":1,"number_of_replicas":2}}}</p>
  
  <p>When I run this I got the following error: </p>
  
  <pre><code>{
  "error" : {
  "root_cause" : [
    {
      "type" : "parse_exception",
      "reason" : "Failed to parse content to map"
    }
  ],
  "type" : "parse_exception",
  "reason" : "Failed to parse content to map",
  "caused_by" : {
    "type" : "json_parse_exception",
    "reason" : "Unexpected character ('s' (code 115)): was expecting double-quote to start field name\n at [Source: org.elasticsearch.transport.netty4.ByteBufStreamInput@f220023; line: 1, column: 3]"
   }
  },
  "status" : 400
  }
  </code></pre>
  
  <p>What am I doing wrong?</p>