The ornamental design for a hanging rackdesign, as shown and described.
FIG. 1 is a front perspective view of my new hanging rack design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a right side elevation view thereof;
FIG. 5 is a left side elevation view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
Any broken lines on the drawing, if any exist on the above-identified Figures, are for the purpose of illustrating objects that may be supported on the claimed design and forms no part of the claimed design.