I am trying to add parameters to a `postForEntity` request but it seems to never go through. Here is the minimum reproducible code:

```
@Test
public void test()
{
    String urlTemplate = UriComponentsBuilder.fromHttpUrl("http://localhost:8080/test")
            .queryParam("update")
            // .queryParam("update", "{update}") //This does not work either
            .encode()
            .toUriString();

    HashMap<String, String> paramValues = new HashMap<>();
    paramValues.put("update", "true");

    HttpEntity<AnimateRequest> httpEntity = new HttpEntity<>(null, new HttpHeaders());

    ResponseEntity<Boolean> response = this.template.postForEntity(
            urlTemplate,
            httpEntity,
            Boolean.class,
            paramValues);
    boolean bb = response.getBody();
}

```

In a controller:

```
@PostMapping(value = "/test")
public ResponseEntity<Boolean> tester(@RequestParam(name="update", required = false) boolean rr)
{
    return ResponseEntity
            .ok()
            .contentType(MediaType.TEXT_PLAIN)
            .body(rr);
}

```

Errors with:

```
org.springframework.web.client.RestClientException: Error while extracting response for type [class java.lang.Boolean] and content type [application/json]; nested exception is org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Cannot deserialize instance of `java.lang.Boolean` out of START_OBJECT token; nested exception is com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize instance of `java.lang.Boolean` out of START_OBJECT token

```

at [Source: (PushbackInputStream); line: 1, column: 1]