Fast2SMS DLT MANAGER is where you can add your entity_id, sender_id, and content_template that are DLT-approved.
After adding these details, you can use the DLT SMS API and DLT_MANUAL_API without needing to pass entity_id and template_id in each API call.
You can also add these details from DLT MANAGER menu inside Fast2SMS Panel.
DLT Manager API will help you to add & fetch entity_id, sender_id, and content_template in automation.
You can also retrieve message_id for each content template, which is needed to pass in DLT SMS API.