List Message

To send a list message, you must assemble an interactive object of type list with the following components:

Object	Description
header	Optional. If you decide to include it, you must set the header’s type to text and add a text field with the desired content. Maximum of 60 characters.
body	Required. Your message’s body. Maximum of 1024 characters.
footer	Optional. Your message’s footer.
action	Required. Inside action, you must nest: - a button field with your button’s content, maximum of 20 characters - at least one section object (maximum of 10) with a maximum of 24 characters for the title for section Inside section, you must add at least one rows object. Maximum of 24 characters for the title for a row and maximum of 72 characters for the description for a row.

Payload

{
    "recipient_type": "individual",
    "to": "918892532751",
    "type": "interactive",
    "interactive": {
        "type": "list",
        "header": {
            "type": "text",
            "text": "hello there"
        },
        "body": {
            "text": "abcd"
        },
        "footer": {
            "text": "abcd"
        },
        "action": {
            "button": "Submit",
            "sections": [
                {
                    "title": "aa",
                    "rows": [
                        {
                            "id": "id1",
                            "title": "row-title-content"
                        }
                    ]
                },
                {
                    "title": "sa",
                    "rows": [
                        {
                            "id": "id2",
                            "title": "row-title-content"
                        }
                    ]
                }
            ]
        }
    },
    "metadata": {
        "messageId": "xxxxx",
        "transactionId": "xxxxx",
        "callbackDlrUrl": "https:xxx.com",
    }
}   

Note : Callback URL is an optional parameter . Please use when you want to change the default URL(configured through smartta). It will only change the domain name other parameters will be same as configurated in smartta.
Additionally, messageId is also an optional parameter used for identification of the message and must not exceed 100 characters.