Allowing optional arrays in requests

[Synchro]

I have an endpoint that accepts single data items, along the lines of:

{
    "title" : "Never gonna give you up",
    "artist" : "Rick Astley"
}

and this is neatly mapped to a Song DTO, and works very nicely with route injection. However, the same endpoint may also receive an array of these items:

[
    {
        "title" : "Never gonna give you up",
        "artist" : "Rick Astley"
    },
    {
        "title" : "White wedding",
        "artist" : "Billy Idol"
    }
]

Do I have to give up on the nice route injection features to be able to handle this? This is a W3C-defined endpoint, so I can't change how it works.

[soltmar]

I've got similar issue, I cannot find a way to use array wrapped data using "from a Request" method.
I have a WebHook which can receive both, a single item or array of items but with the difference that a single item is still wrapped in array. Would be nice to have a solution to unwrap single item from array, and a second to collect from array of items directly from dependency injection