Allocations in nextGen SO api

[Magnus Vadla]

With certain order type settings, adding so lines requires allocation input. This is possible in the gui, but I don't see any allocation property in the api POST endpoints?

{
    "title": "One or more validation errors occurred.",
    "status": 400,
    "detail": "Refer to the errors property for additional details",
    "instance": "/api/v3/SalesOrders/RR/055249/lines",
    "details": [
        {
            "code": "5006-ProvidedInvalidAllocations",
            "message": "Missing splits for other allocations",
            "parameters": {
                "property": ""
            }
        }
    ],
    "errors": {
        "DomainValidation": [
            "Missing splits for other allocations"
        ]
    }
}