curl --request PUT \
  --url https://api.reply.io/v3/sequences/{id}/steps/{step_id}/templates/{template_id} \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "subject": "<string>",
  "body": "<string>",
  "isEnabled": true,
  "id": 123
}
'

{
  "subject": "<string>",
  "body": "<string>",
  "isEnabled": true,
  "id": 123
}