Some sftp operations take handles, and the logs that include those handles are storing things like
May 16 15:07:52 sftp-prod node[29803]: 5/16/2025, 3:07:52 PM debug: Successful Write. {"reqId":76774,"handle":{"type":"Buffer","data":[54,49,56,55,54,101,57,50,45,54,97,50,99,45,52,102,98,56,45,56,54,100,55,45,100,49,101,55,98,50,51,52,50,53,52,52]},"written":32768}