title: How to handle an array of arrays in MediatR
body: <p>I have a command</p>
  <pre><code>public class UpdateEntityCommand: IRequest&lt;bool&gt;
  {
      public int Id { get; set; }
      public IEnumerable&lt;OtherEntityDto&gt; Instruments{ get; set; }
  }
  </code></pre>
  <p>I need to update many entities in one request. Can I do something like this or there are a better way?</p>
  <pre><code>public class UpdateEntitiesCommand: IRequest&lt;bool&gt;
  {
      public IEnumerable&lt;UpdateEntityCommand&gt; Commands { get; set; }
  }
  </code></pre>