Your case comes under the old mantra of "if it looks too good to be true, then it is too good to be true".
The reason why I believe I may have grounds to dispute it is because there are no markings on the road or signs on the street to indicate that permits are required.
This is because it is a Permit Parking Zone (PPZ), a fairly recent introduction by government. These only have signs at the entrances to the zone, and no carriageway markings or other signs are needed. In this particular case, there isn't a total ban, because the sign says there are signed bays for non-permit parking. You have posted the sign for one such bay.
I think if I were an adjudicator, I would he highly critical of the presence of only a single sign and no repeater signs whatever. This is a huge zone, stretching up to the Ashton New Road, yet the zone entrance here is also a single sign.
Of course, it is there because the Etihad Stadium is a short distance away, and fans come by car and park anywhere close. GSV September 2023, shows as Permit Holders Only on event days, with the next event day at the bottom of the sign. Obviously the fag of having to go round and update all the signs became too onerous for the council so they have just made the area Permits Only 24x7. No need for any effort now, just go round and get the money in !
You would have passed this bay on your way up Rylance St just before you turned right: -
https://maps.app.goo.gl/4HytFac646vJetEDAAny reason for parking where you did ? Reason to ask is that residents are able to buy Visitor Permits which are given to their visitor, and one displays it on the car, or, sometimes, you can but a virtual visitor permit. Without these no traders could possible do any business in such areas.