title: Unable to execute GraphQL mutation using cURL
body: <p>I have deployed a Mutation in a MicroProfile container (WildFly) and I'm able to execute it in the GraphQL UI:</p>
  <pre><code>mutation Add {
    createOrder(order: {
        id: 1,
        type: &quot;car&quot;
        model: &quot;Ferrari&quot;
        price: 500
      }
    )
    {
      type
      model
      price
    }
  }
  </code></pre>
  <p>However, when I try to execute the same mutation using cURL:</p>
  <pre><code>curl \
    -X POST \
    -H &quot;Content-Type: application/json&quot; \
    --data '{ &quot;query&quot;: &quot;mutation Add {
    createOrder(order: {
        id: 1,
        type: \&quot;car\&quot;
        model: \&quot;Ferrari\&quot;
        price: 500
      }
    )
    {
      type
      model
      price
    }
  }
  &quot; }' http://localhost:8080/demo/graphql
  </code></pre>
  <p>However it fails with:</p>
  <pre><code>javax.json.stream.JsonParsingException: Unexpected char 10 at (line no=1, column no=27, offset=26)
  </code></pre>
  <p>I haven't found many examples of running Mutation with command line tools like cURL and  don't know where the error is. Any help?
  Thanks</p>