curl --request PUT \
  --url https://sandbox.layerfi.com/v1/businesses/{businessId}/sms \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "sms_enabled": true
}
'

{
  "sms_enabled": true,
  "sms_stopped": true
}