diff --git a/src/Umbraco.Web/PublishedCache/NuCache/DataSource/ContentCacheDataSerializationResult.cs b/src/Umbraco.Web/PublishedCache/NuCache/DataSource/ContentCacheDataSerializationResult.cs
index 7cd388d712..cde39eaa3c 100644
--- a/src/Umbraco.Web/PublishedCache/NuCache/DataSource/ContentCacheDataSerializationResult.cs
+++ b/src/Umbraco.Web/PublishedCache/NuCache/DataSource/ContentCacheDataSerializationResult.cs
@@ -3,6 +3,10 @@ using System.Collections.Generic;
 
 namespace Umbraco.Web.PublishedCache.NuCache.DataSource
 {
+    /// <summary>
+    /// The serialization result from <see cref="IContentCacheDataSerializer"/> for which the serialized value
+    /// will be either a string or a byte[]
+    /// </summary>
     public struct ContentCacheDataSerializationResult : IEquatable<ContentCacheDataSerializationResult>
     {
         public ContentCacheDataSerializationResult(string stringData, byte[] byteData)
diff --git a/src/Umbraco.Web/PublishedCache/NuCache/DataSource/IContentCacheDataSerializer.cs b/src/Umbraco.Web/PublishedCache/NuCache/DataSource/IContentCacheDataSerializer.cs
index 87ac5af91e..f628c8981b 100644
--- a/src/Umbraco.Web/PublishedCache/NuCache/DataSource/IContentCacheDataSerializer.cs
+++ b/src/Umbraco.Web/PublishedCache/NuCache/DataSource/IContentCacheDataSerializer.cs
@@ -11,7 +11,21 @@ namespace Umbraco.Web.PublishedCache.NuCache.DataSource
     /// </remarks>
     public interface IContentCacheDataSerializer
     {
+        /// <summary>
+        /// Deserialize the data into a <see cref="ContentCacheDataModel"/>
+        /// </summary>
+        /// <param name="contentTypeId"></param>
+        /// <param name="stringData"></param>
+        /// <param name="byteData"></param>
+        /// <returns></returns>
         ContentCacheDataModel Deserialize(int contentTypeId, string stringData, byte[] byteData);
+
+        /// <summary>
+        /// Serializes the <see cref="ContentCacheDataModel"/> 
+        /// </summary>
+        /// <param name="contentTypeId"></param>
+        /// <param name="model"></param>
+        /// <returns></returns>
         ContentCacheDataSerializationResult Serialize(int contentTypeId, ContentCacheDataModel model);
     }
 
diff --git a/src/Umbraco.Web/PublishedCache/NuCache/DataSource/JsonContentNestedDataSerializer.cs b/src/Umbraco.Web/PublishedCache/NuCache/DataSource/JsonContentNestedDataSerializer.cs
index 2fa892a5e6..47f07b8b1d 100644
--- a/src/Umbraco.Web/PublishedCache/NuCache/DataSource/JsonContentNestedDataSerializer.cs
+++ b/src/Umbraco.Web/PublishedCache/NuCache/DataSource/JsonContentNestedDataSerializer.cs
@@ -10,7 +10,7 @@ namespace Umbraco.Web.PublishedCache.NuCache.DataSource
     {
         public ContentCacheDataModel Deserialize(int contentTypeId, string stringData, byte[] byteData)
         {
-            if (byteData != null)
+            if (stringData == null && byteData != null)
                 throw new NotSupportedException($"{typeof(JsonContentNestedDataSerializer)} does not support byte[] serialization");
 
             // by default JsonConvert will deserialize our numeric values as Int64