PBIe REST API - POST data

[hpahkala]

We made PBI embedded REST AP tech trial. GETs seem to work well but when we tried to add one row to PBIe data table by "POST data" we got "unauth" error.

"POST data" seems to be available in PBIe REST interface, but it is not documented in msdn.microsoft.com/en-us/library/azure/mt712303.aspx

Any insight what could be our problem? "POST data" is not supported or it is some kind of access right issue or something else?