Error while ingesting input stream - in CreatePDF from PDF Tools API

[Kedar5E92]

Trying to implemet createPDF REST API (Public API) from PDF Tools API thru python request post
for Form Parameters - <file_content_part_name> requires The input file content. What format of file content is required
here. I tried bynary type but getting {"cpf:status":{"completed":true,"type":"Internal Server Error.","title":"Error while ingesting input stream.","status":500,"report":"{\"error_code\":\"REQUEST_SAVING_FAILED\"}"}