Dictionary data = new Dictionary(); data.Add("format", speechData.format); data.Add("rate", speechData.rate); data.Add("channel", speechData.channel); data.Add("cuid", speechData.cuid); data.Add("token", speechData.token); data.Add("speech", speechData.speech); string jsonDataPost = Json.Serialize(data); Dictionary headers = new Dictionary(); headers.Add("Content-Type", "application/json"); byte[] body = System.Text.Encoding.UTF8.GetBytes(jsonDataPost); WWW www = new WWW(speechUrl, body, headers...