curl --request POST \
  --url https://api.iomnihub.ai/stable/open/whatsapp/send-template \
  --header 'Content-Type: multipart/form-data' \
  --form template_id=102323213 \
  --form channel_id=1022 \
  --form 'customer_phone=+628123456789' \
  --form 'body_vars={
  "1": "John Doe"
}' \
  --form 'button_vars={
  "1": "Home"
}' \
  --form header_type=document \
  --form 'customer_attributes={
  "1": "John Doe"
}' \
  --form file=@example-file

{
  "success": true,
  "data": {
    "status": "ongoing"
  }
}