Send a raw payload message to a given user

Raw payloads can be found differently for each separate channel:

One or many raw payloads can be used in the messages array

You can send an image to someone with the following json payload:

{
    "data": {
        "attributes": {
            "messages": [{
                "attachment": {
                    "type": "image",
                    "payload": {
                        "url": "http://placekitten.com/201/202",
                        "is_reusable": true
                    }
                }
            }],
            "recipient": "[email protected]"
        },
        "type": "external-activity"
    }
}
Language
Authentication
OAuth2
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