How to perform 'Async Verify Signature' in SAS.
* Task: Async Verify Signature
* Language: SAS
%macro async_verify_signature()
* Implementation for Async Verify Signature
%let result = ...; * Initialize variable
* TODO: Implement core logic here
* Step 1: Prepare data
* Step 2: Process Async Verify Signature
%put("Done");
%mend;