Which model does this refer to? Is it the "HRJobPay" model ( https://github.com/civicrm/civihr/blob/8e7f9e7cba/hrjob/js/entities/hrjob.js#L107 )? That doesn't seem right to me -- the EditSettings screen is not about editing the individual's payment info, it's about editing the global settings. We probably need to add a new model class, CRM.HRApp.Entities.Setting, for saving the settings.