@type t() :: %ApolloSignal.Types.ContactPropertyResponse{
  created_at: String.t(),
  fallback_value: String.t() | nil,
  id: String.t(),
  key: String.t(),
  object: String.t() | nil,
  project_id: String.t(),
  type: String.t(),
  updated_at: String.t()
}