@type t() :: %MailSlurpAPI.Model.TrackingPixelDto{
  createdAt: DateTime.t(),
  html: String.t(),
  id: String.t(),
  inboxId: String.t() | nil,
  recipient: String.t() | nil,
  seen: boolean(),
  seenAt: DateTime.t() | nil,
  sentEmailId: String.t() | nil,
  url: String.t()
}