Advanced Source Mapping

<?xml version="1.0"?>
<query>
    <userid>[UserID]</userid> <!-- required -->
    <userkey>[UserKey]</userkey> <!-- required -->
    <action>AddMedia</action> <!-- required -->
    <source>[SourceFile1]</source> <!-- required -->
    <source>
        <url>[SourceFile2]</url>
        <url>[AdditionalSourceFile2]</url>
        <audio_stream>
            <use_stream_id>[SourceMediaAudioStreamID]</use_stream_id>
            <natural_order>[yes|no]</natural_order>
            <language>[Language]</language>
            <channel>
                <id>[OutputChannelID]</id>
                <in>
                    <id>[SourceTrackID:SourceChannelID]</id>
                    <gain>[ChannelGainLevel]</gain>
                </in>
                <in>
                    <!-- Input channel params -->
                </in>
            </channel>
            <channel>
                <!-- Audio channel params -->
            </channel>
            <normalize>[yes|no]</normalize>
            <layout>[AudioLayoutName]</layout>
            <start>[StartTimecode]</start>
            <finish>[FinishTimecode]</finish>
            <duration>[Duration]</duration>
        </audio_stream>
        <!-- Multiple audio streams -->
        <audio_stream>
            <!-- Audio stream params -->
        </audio_stream>
    </source>
    <source>
        <url>[SourceFile3]</url>
        <!-- Source params -->
    </source>
    <format> <!-- required -->
        <!-- Format params --> 
    </format>
</query>

{
    "query": {
        "userid": "[UserID]", // required
        "userkey": "[UserKey]", // required
        "action": "AddMedia",  // required
        "source": [ // required
            "[SourceFile1]", 
            {
                "url": [
                    "[SourceFile2]",
                    "[AdditionalSourceFile2]"
                ],
                "audio_stream": [
                    {
                        "use_stream_id": "[SourceMediaAudioStreamID]",
                        "natural_order": "[yes|no]",
                        "language": "[Language]",
                        "channel": [
                            {
                                "id": "[OutputChannelID]",
                                "in": [
                                    {
                                        "id": "[SourceTrackID:SourceChannelID]",
                                        "gain": "[ChannelGainLevel]"
                                    },
                                    {
                                        // Input channel params
                                    }
                                ]
                            },
                            {
                                // Audio channel params
                            }
                        ],
                        "normalize": "[yes|no]",
                        "layout": "[AudioLayoutName]",
                        "start": "[StartTimecode]",
                        "finish": "[FinishTimecode]",
                        "duration": "[Duration]"
                    }, 
                    {
                        //Audio stream params
                    }
                ]
            },
            {
                "url": "[SourceFile3]"
                // Source params
            }
        ],
        "format": { // required
            // Format params
        }
    }
}