--- a/media.go	Sat Sep 29 11:46:33 2018 +0200
+++ b/media.go	Sun Jan 13 13:25:58 2019 +0100
@@ -57,7 +57,7 @@
 		}
 	}
 
-	req, err := mc.prepareRequest("media", rest.Post, params)
+	req, err := mc.prepareRequest("v1/media", rest.Post, params)
 	if err != nil {
 		return nil, errors.Wrap(err, "media prepareRequest failed")
 	}