Transition reference id to data (#828)

* Transition reference id to data

* field length and request model updates

src/Core/Models/Business/ReferenceEventData.cs

@@ -0,0 +1,16 @@
+using System;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Serialization;
+
+namespace Bit.Core.Models.Business
+{
+    [JsonObject(NamingStrategyType = typeof(CamelCaseNamingStrategy))]
+    public class ReferenceEventData
+    {
+        public string Id { get; set; }
+
+        public string Layout { get; set; }
+
+        public string Flow { get; set; }
+    }
+}