Reporting APIs have been upgraded and this resource is deprecated. You must use the new 2.0 API for Reporting.
The Report Save object allows you to save a report definition to use in the Report Queue method and to schedule a report for periodic emailing. A typical use case would be to GET the Report Save object, then POST a new instance of it to Report Queue to run the report. If the frequency field is non-blank, the report will be automatically generated and emailed to the recipients. For more information on reporting, see Reporting.