@type t() :: %Mayfly.Events.SNS.Record{
  message: term(),
  message_attributes: %{optional(String.t()) => term()},
  message_id: String.t() | nil,
  raw: map(),
  subject: String.t() | nil,
  subscription_arn: String.t() | nil,
  timestamp: DateTime.t() | String.t() | nil,
  topic_arn: String.t() | nil
}