curl --request PUT \
  --url https://api-{dc}.moengage.com/v1.0/custom-templates/sms \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data @- <<EOF
{
  "external_template_id": "d05a44f0-a7cf-471a-bcb6-63054800a367",
  "update_campaigns": false,
  "basic_details": {
    "message": "Hi {{UserAttribute['first_name']}}, your order has been delivered!"
  },
  "meta_info": {
    "template_name": "Shipping Update Template V2",
    "updated_by": "jane.doe@example.com",
    "template_version": "2"
  }
}
EOF

{
  "external_template_id": "eca024b7-a8ea-4f31-9154-5b80c85d18a9"
}

{
  "error": {
    "code": "400 Bad Request",
    "message": "Invalid template id",
    "details": [
      {
        "code": "MissingValue",
        "target": "9925c8",
        "message": "9925c8 is invalid template id."
      }
    ],
    "request_id": "BTkUaYgU"
  }
}

{
  "title": "Internal Server Error",
  "message": "An unexpected error was encountered while processing this request. Please contact MoEngage Team"
}