destinationCountryParameters
This field is used for any country-specific registration requirements. Currently, this setting is only used when you send messages to recipients in India using a sender ID. For more information see Special requirements for sending SMS messages to recipients in India.
IN_ENTITY_ID
The entity ID or Principal Entity (PE) ID that you received after completing the sender ID registration process.IN_TEMPLATE_ID
The template ID that you received after completing the sender ID registration process.Make sure that the Template ID that you specify matches your message template exactly. If your message doesn't match the template that you provided during the registration process, the mobile carriers might reject your message.