curl --request POST \
  --url https://services.pref.rio/rmi/v1/phone/{phone_number}/opt-in \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "channel": "<string>",
  "cpf": "<string>",
  "validation_result": {
    "valid": true
  }
}
'

{
  "phone_mapping_id": "<string>",
  "status": "<string>"
}