private async Task ExecuteAsync(HttpContext httpContext, StatefulServiceContext serviceContext, IReliableStateManager stateManager)
{
// Read the body.
var reader = new StreamReader(httpContext.Request.Body, Encoding.UTF8, detectEncodingFromByteOrderMarks: true, bufferSize: 4096, leaveOpen: true);
string content = await reader.ReadToEndAsync().ConfigureAwait(false);
var operations = JsonConvert.DeserializeObject <EntityOperation <JToken, JToken>[]>(content);
// Update the reliable collections.
var results = await stateManager.ExecuteAsync(operations).ConfigureAwait(false);
httpContext.Response.ContentType = "application/json";
httpContext.Response.StatusCode = (int)HttpStatusCode.OK;
// Write the response.
var response = JsonConvert.SerializeObject(results);
await httpContext.Response.WriteAsync(response).ConfigureAwait(false);
}