Bulk Update Unmatched Transactions in one go using RestAPI/EPMAutomate

Summary:

Is there any alternative way bulk Update Unmatched Transactions in one go.

currently i am using below REST end point but its slow and takes time process large count of records, I am looking for the approach using Rest API or EPM Automate to bulk update all records in once or as Job submission

POST /arm/rest/{api_version}/dataSources/{dataSource}/transactions/{transaction}

https://docs.oracle.com/en/cloud/saas/enterprise-performance-management-common/prest/arcs_rest_edit_unmatched_transactions.html