def update(params={})
      machine.request_options = machine.request_options.merge(body: parse_params(params, :metadata).to_json)
      Zcloudjp::Client.put("/machines/#{machine.id}/metadata", machine.request_options)
    end
def update(params={})
      machine.request_options = machine.request_options.merge(body: parse_params(params, :metadata).to_json)
      Zcloudjp::Client.put("/machines/#{machine.id}/metadata", machine.request_options)
    end
PUT /machines/:id/metadata/:key.:format