How to post data from windows phone to web api

Hi, everyone, can someone help me to post the class from windows phone to webservices, using entity6, this is my server code



 [ResponseType(typeof(wizre))]
        public async Task<IHttpActionResult> Postwizre(string o)
        {
            wizre reok = JsonConvert.DeserializeObject<wizre>(o);
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            db.wizres.Add(reok);

            try
            {
                await db.SaveChangesAsync();
            }
            catch (DbUpdateException)
            {
                if (wizreExists(reok.devid))
                {
                    return Conflict();
                }
                else
                {
                    throw;
                }
            }

            return CreatedAtRoute("DefaultApi", new { id = reok.devid }, reok);
        }
</pre>



my class model is:
 class wizre
    {
        public string devid { get; set; }
        public string com { get; set; }
        public byte[] im1 { get; set; }
        public byte[] im2 { get; set; }
        public byte[] im3 { get; set; }
    }</pre>


Thanks