Request

<?xml version="1.0"?>
<query>
    <userid>[UserID]</userid> {/* required */}
    <userkey>[UserKey]</userkey> {/* required */}
    <action>savePreset</action>
    <name>[PresetName]</name>
    <format> {/* REQUIRED */}
        <output>[output]</output> {/* REQUIRED */}
        [FormatParams]
    </format>
</query>

{
    "query": {
        "userid": "[UserID]",
        "userkey": "[UserKey]",
        "action": "savePreset",
        "name": "[PresetName]",
        "format": {
            "output": "[output]"
        }
    }
}

Parameter	Description	Allowed Values	Default Value
name	Specify the preset name.	String	If not specified, preset name will be based on output name.
format	Specify the preset format.	Same as AddMedia <format> section	None

Response

<?xml version="1.0"?>
<response>
    <message>Saved</message>
    <SavedPreset>[PresetName]</SavedPreset>
    <SavedPreset>{/* Each specified format would be saved as separate preset */}</SavedPreset>
</response>

{
    "response": {
        "message": "Saved",
        "SavedPreset": [
            "[PresetName]"
        ]
    }
}

👍
Note
Presets can also be saved using an AddMedia request by specifying the preset name in the <save_preset> parameter in the <format> section of the request. An example is below.

Request

<?xml version="1.0"?>
<query>
    <userid>[UserID]</userid> {/* required */}
    <userkey>[UserKey]</userkey> {/* required */}
    <action>addMedia</action>
    <format> {/* REQUIRED */}
        <output>[output]</output> {/* REQUIRED */}
        [FormatParams]
        <save_preset>[PresetName]</save_preset>
    </format>
</query>

{
    "query": {
        "userid": "[UserID]",
        "userkey": "[UserKey]",
        "action": "addMedia",
        "format": {
            "output": "[output]",
            "save_preset": "[PresetName]"
        }
    }
}

Response

<?xml version="1.0"?>
<response>
    <message>[ResponseMessage]</message>
    <SavedPreset>[PresetName]</SavedPreset>
</response>

{
    "response": {
        "message": "[ResponseMessage]",
        "SavedPreset": "[PresetName]"
    }
}