diff --git a/EnvelopeGenerator.Application/Pdf/PSPDFKit/Annotation.cs b/EnvelopeGenerator.Application/Pdf/PSPDFKit/Annotation.cs
new file mode 100644
index 00000000..eacd0fe1
--- /dev/null
+++ b/EnvelopeGenerator.Application/Pdf/PSPDFKit/Annotation.cs
@@ -0,0 +1,98 @@
+using EnvelopeGenerator.Application.Exceptions;
+
+namespace EnvelopeGenerator.Application.Pdf.PSPDFKit;
+
+internal class Annotation
+{
+    private string? _id;
+
+    public int EnvelopeId { get; private set; } = 0;
+
+    public int ReceiverId { get; private set; } = 0;
+
+    public int Index { get; private set; } = 0;
+
+    public string EgName { get; private set; } = string.Empty;
+
+    public bool HasStructuredID { get; private set; } = false;
+
+    public bool IsLabel
+    {
+        get
+        {
+            if (string.IsNullOrEmpty(EgName))
+                return false;
+
+            var parts = EgName.Split('_');
+            return parts.Length > 1 && parts[1] == "label";
+        }
+    }
+
+    public string? Id
+    {
+        get => _id;
+        set
+        {
+            _id = value;
+
+            if (string.IsNullOrWhiteSpace(value))
+                throw new BurnAnnotationException("The identifier of annotation is null or empty.");
+
+            var parts = value.Split('#');
+
+            if (parts.Length != 4)
+                return;
+            // throw new BurnAnnotationException($"The identifier of annotation has more or less than 4 sub-part. Id: {_id}");
+
+            if (!int.TryParse(parts[0], out int envelopeId))
+                throw new BurnAnnotationException($"The envelope ID of annotation is not integer. Id: {_id}");
+            EnvelopeId = envelopeId;
+
+            if (!int.TryParse(parts[1], out int receiverId))
+                throw new BurnAnnotationException($"The receiver ID of annotation is not integer. Id: {_id}");
+            ReceiverId = receiverId;
+
+            if (!int.TryParse(parts[2], out int index))
+                throw new BurnAnnotationException($"The index of annotation is not integer. Id: {_id}");
+            Index = index;
+
+            EgName = parts[3];
+            HasStructuredID = true;
+        }
+    }
+
+    /// <summary>
+    /// 
+    /// </summary>
+    public List<double>? Bbox { get; set; }
+    
+    /// <summary>
+    /// 
+    /// </summary>
+    public string? Type { get; set; }
+
+    /// <summary>
+    /// 
+    /// </summary>
+    public bool IsSignature { get; set; }
+
+    /// <summary>
+    /// 
+    /// </summary>
+    public string? ImageAttachmentId { get; set; }
+
+    /// <summary>
+    /// 
+    /// </summary>
+    public Lines? Lines { get; set; }
+
+    /// <summary>
+    /// 
+    /// </summary>
+    public int PageIndex { get; set; }
+
+    /// <summary>
+    /// 
+    /// </summary>
+    public string? StrokeColor { get; set; }
+}
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