Fix for issue #47

Author: maria-simon

lib/apicontrollersbase.js

@@ -85,7 +85,7 @@ class APIOperationBase {
 			method: 'POST',
 			headers: {
 				'Content-Type': 'application/json',
-				'Content-Length': this._request.length
+				'Content-Length': Buffer.byteLength(JSON.stringify(this._request))
 			},
 			json: true,
 			timeout: config.timeout,