flow_create

var messages = [
	// message
	{
		type: 1,
		content: {
			text: "example message",
			buttons: [ // the same with menu.
				{ title: "", type: '', payload: ''}
			]
		}
	},
	// image
	{
		type: 2,
		content: {
			image_url: url,
			buttons: [ // the same with menu.
				{ title: "", type: '', payload: ''}
			]
		}
	},
	// card
	{
		type: 6,
		content: [
			{
				image_url: "url",
				title: "",
				subtitle: "",
				buttons: [ // the same with menu.
					{ title: "", type: '', payload: ''}
				]
			}
		]
	},
	// gallery
	// list
	{
		type: 5,
		top_element_style: "<LARGE | COMPACT>",
		content: [
			{
				image_url: "url",
				title: "",
				subtitle: "",
				buttons: [ // the same with menu.
					{ title: "", type: '', payload: ''}
				],
				default_action: {
					type: "web_url",
					url: "",
					messenger_extension: false,
					webview_height_ratio: "FULL" // <COMPACT | TALL | FULL>
				}
			}
		}
	]
]