This is the response object from the StartExecution operation.
Inheritance: Amazon.Runtime.AmazonWebServiceResponse
        /// <summary>
        /// Unmarshaller the response from the service to the response class.
        /// </summary>  
        /// <param name="context"></param>
        /// <returns></returns>
        public override AmazonWebServiceResponse Unmarshall(JsonUnmarshallerContext context)
        {
            StartExecutionResponse response = new StartExecutionResponse();

            context.Read();
            int targetDepth = context.CurrentDepth;
            while (context.ReadAtDepth(targetDepth))
            {
                if (context.TestExpression("executionArn", targetDepth))
                {
                    var unmarshaller = StringUnmarshaller.Instance;
                    response.ExecutionArn = unmarshaller.Unmarshall(context);
                    continue;
                }
                if (context.TestExpression("startDate", targetDepth))
                {
                    var unmarshaller = DateTimeUnmarshaller.Instance;
                    response.StartDate = unmarshaller.Unmarshall(context);
                    continue;
                }
            }

            return response;
        }