\documentclass[12pt,oneside]{article}
\usepackage[patches]{pdfresources}
\usepackage{tikz,xcolor}
\usepackage{transparent}
\ExplSyntaxOn
\driver_pdf_compresslevel:n {0}
\driver_pdf_compress_objects:n {0}
%test local resource:
%\driver_pdf_pageresources_gput:nnnn{1}{ColorSpace}{abc}{/Deviceblub}
\driver_pdf_object_new:nn {spotcolor_obj}{array}
\cs_generate_variant:Nn \driver_pdf_object_write:nn {nx}
\driver_pdf_object_write:nx{spotcolor_obj}
{
/Separation~/\pdfescapename{BarTone~555~GN} /DeviceCMYK