POST http://localhost:8080/cmx/cs/localhost-orcl-ORS/Person/123?systemName=Admin
{
    BVT: {
        firstName: {
            systemName: "Sales",
            sourceKey: "0001"
        }
    }
}

POST http://localhost:8080/cmx/cs/localhost-orcl-ORS/Person/123?systemName=Admin
{
    BVT: {
        firstName: {
            rowidXref: "789"
        }
    }
}