@type t() :: %ApolloSignal.Types.ContactResponse{
  created_at: String.t(),
  email: String.t(),
  first_name: String.t() | nil,
  id: String.t(),
  last_name: String.t() | nil,
  object: String.t() | nil,
  phone: String.t() | nil,
  profile_image_url: String.t() | nil,
  project_id: String.t(),
  properties: %{optional(String.t()) => String.t()},
  segments: [String.t()],
  topics: [ApolloSignal.Types.TopicSubscriptionResponse.t()],
  unsubscribed: boolean(),
  updated_at: String.t()
}