diff --git a/src/base/RequestClient.ts b/src/base/RequestClient.ts
index 002f2866e..f48b00b13 100644
--- a/src/base/RequestClient.ts
+++ b/src/base/RequestClient.ts
@@ -190,8 +190,13 @@ class RequestClient {
       validateStatus: (status) => status >= 100 && status < 600,
     };
 
-    if (opts.data) {
-      options.data = qs.stringify(opts.data, { arrayFormat: "repeat" });
+    if (opts.data && options.headers) {
+      if(options.headers["Content-Type"] === "application/x-www-form-urlencoded") {
+        options.data = qs.stringify(opts.data, { arrayFormat: "repeat" });
+      }
+      else if(options.headers["Content-Type"] === "application/json") {
+        options.data = opts.data;
+      }
     }
 
     if (opts.params) {
diff --git a/src/rest/PreviewMessaging.ts b/src/rest/PreviewMessaging.ts
new file mode 100644
index 000000000..3569a2ae8
--- /dev/null
+++ b/src/rest/PreviewMessaging.ts
@@ -0,0 +1,15 @@
+import PreviewMessagingBase from "./PreviewMessagingBase";
+import {MessageListInstance} from "./previewMessaging/v1/message";
+
+class PreviewMessaging extends PreviewMessagingBase {
+  /**
+   * @deprecated - Use v1.messages; instead
+   */
+  get messages(): MessageListInstance {
+    console.warn(
+        "messages is deprecated. Use v1.messages; instead."
+    );
+    return this.v1.messages;
+  }
+}
+export = PreviewMessaging