curl --request PUT \
  --url https://services.pref.rio/rmi/v1/phone/{phone_number}/notification-preferences \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "category_opt_ins": {},
  "channel": "<string>",
  "opt_in": true,
  "reason": "<string>"
}'

{
  "category_opt_ins": {},
  "opt_in": true,
  "phone_number": "<string>",
  "updated_at": "<string>"
}