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