namespace Models
{
    public class FingerprintData
    {
        public string Channel { get; set; }
        public PayloadData Payload { get; set; }
    }

    public class PayloadData
    {
        public string ImageBase64 { get; set; }
        public string TemplateBase64 { get; set; }
        // Add other properties like device info as needed
    }
}