Testing of the web services

I have  a method which insert record into the database using entity framework.
 We are build a Soap based web services. I would like to know how we are going to test
this web service as  project object  as a parameter. Any tool or any way to do that.

public IHttpActionResult PostProject(ProjectDTO project)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            Project entity = new Project()
            {
                ProjectNumber = project.ProjectNumber,
                ProjectDescription = project.ProjectDescription,
                CreateDate = DateTime.Now,
                CreateUser = project.CreateUser,
                Latitude = project.Latitude,
                Longitude = project.Longitude,
                ProjectStatus = project.ProjectStatus,
                HoursPerShift = project.HoursPerShift,
                TimeZone = project.TimeZone,
                StandByWBSElementNumber = project.StandByWBSElementNumber,
            };

            db.Projects.Add(entity);

            try
            {
                db.SaveChanges();
            }
            catch (DbUpdateException)
            {
                if (ProjectExists(project.ProjectNumber))
                {
                    return Conflict();
                }
                else
                {
                    throw;
                }
            }

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