/// <summary>
/// Update the details of a manual reminder.
/// </summary>
/// <param name="reminder_id">The reminder_id is the identifier of the existing manual reminder.</param>
/// <param name="update_info">The update_info is the Manualreminder object which contains the updation information.</param>
/// <returns>System.String.<br></br>The success message is "Your payment reminder preferences have been saved."</returns>
public ManualReminder UpdateManualReminder(string reminder_id, ManualReminder update_info)
{
var url = baseAddress + "/manualreminders/" + reminder_id;
var json = JsonConvert.SerializeObject(update_info);
var jsonstring = new Dictionary <object, object>();
jsonstring.Add("JSONString", json);
var response = ZohoHttpClient.put(url, getQueryParameters(jsonstring));
return(SettingsParser.getManualReminder(response));
}