a.s = "{?#text?: ?https://lastfm-img2.akamaized.net/i/u/34s/3b54885952161aaea4ce2965b2db1638.png?,?😀size? : ?small?}"
b.s = ReplaceString(a, "?", Chr(34))

Debug b

Debug ParseJSON(0, b)

NewMap myJson.s()

ExtractJSONMap(JSONValue(0), myJson())

Debug myJson("#text")
Debug myJson("😀size")