Merge pull request #83 from bdeanindy/Issue-82

Resolve issue #82

Author: aydrian

lib/toApiFormat.js

@@ -5,7 +5,7 @@ module.exports = function toApiFormat(source) {
 
   var dest = {};
   // List of property names which we do not want to modify the sub-property names
-  var excludeList = ['recipients', 'substitution_data', 'tags', 'metadata', 'content', 'attributes', 'headers'];
+  var excludeList = ['substitution_data', 'tags', 'metadata', 'attributes', 'headers'];
 
   try{
     // Handle arrays