Structure for landing object in transactional object
t() :: %BatchElixir.RestClient.Transactional.Landing{ actions: [BatchElixir.RestClient.Transactional.Landing.Action.t()], body: String.t(), header: String.t(), image: String.t(), image_description: String.t(), theme: String.t(), title: String.t(), tracking_id: String.t() }