You can use the deep insert process to create single entities deeply in ABAP for SAP HANA. Below steps are used in this process.
The first step is SAP Gateway framework extracts expand expression out of the payload. The second step is to send data to the backend. The third step is calling CREATE_DEEP_ENTITY method. The last step is application uses /IWBEP/IF_MGW_ODATA_EXPAND to validate if the given expansion can be handled.