Hello Prathamesh,
if you implement SAP Note 1827856 - "Test program for creating composed spool requests", the new Report "RSPO_TEST_CREATE_SPOOL" will be available in SE38.
The purpose of this Report is to demonstrate how documents can be uploaded and stored in transaction SP01 in binary format.
You can see here how a binary data can be stored in the spool.
Regards,
Laszlo