public void Post(string values)
    {
        var r = values;

    }

$scope.SubmitData = function (DataToSubmit) {
    var string = JSON.stringify(DataToSubmit);
    $http({
        method: 'POST',
        data: {
            values: string,
        },
        url: 'api/aulamethod',
    });
}

values:"[{"CompanyName":"column a","SupplierCode":"column b","DocumentNumber":"column c","Reference":"column d","InternalCurrencyValue":"column e","BlockadeUnblocking1":"column f","Justification":"column g","Request":"column h","$$hashKey":"object:23"}]"

public class ValuesViewModel
{
    public string Values { get; set; }
}

[HttpPost]
public void Post([FromBody]ValuesViewModel values)
{
   var r = values;
}