A 522-4 would be a 52 Manhattan 2 door sedan; a 52 Manhattan 2 door Club Coupe would be a 522-7. There were Club Coupes in 51, 52 (Virginian) and 'real' 1952. If it is a 52 Virginian, it would be a Deluxe instead of a Manhattan, as Frazer in 51 was still using Manhattan
The rest of the numbers are interesting. 140 paint would be black (onyx) and I think in a single colour--not a two-tone car--, and I don't know what trim 5400 is as I don't have my Handbook at hand (paper or electronic), but it seems it is a *1953* combination, not a 52 Virginian (reserialized 51 models with the small taillights) or late 52 (big taillights). The trim codes are 2xxx for 1952, and there are 1953 cars on the registry sporting 140 5400 codes, including one 5324 53 Manhattan 2 door sedan. Not sure what interior paint 32 is either. So, possibly a 53--or a 52 with a 53 plate affixed??
You can simply tell a 52 from a 53, as the trunk hinges on a 52 are still chrome and external, whereas on a 53 they are hidden inside. There are several other obvious visual differences, trunk lock, rear fender trim, headlight rings, dash etc but that is the one most unlikely to have been changed over the years, I think.
This could possibly be a 52 Manhattan Club Coupe in real life but the numbers don't seem to match what it should be.
EDIT--that is a lovely colour combination, black and persian gray
Engine serial number is not the same as a serial number, and that number starting 214..... is too high to be the car serial number 6L226-K is just a reference to it being a Kaiser 226 CID flathead six, I think