{"a":1, "b":[2.0, 1.3, -6.1], "c":[false, true], "d":4.1}
{"a":-10, "b":[2.0, 1.3, -6.1], "c":null, "d":null}
{"a":2, "b":[2.0, null, -6.1], "c":[false, null], "d":"text"}
{"a":3, "b":4, "c": true, "d":[1, false, "array", 2.4]}