The JSON body structure can be seen from this sample:

<details><summary>Request Body Sample</summary>

```json
{
  "input": {
    "account": "minio",
    "groups": null,
    "action": "s3:ListBucket",
    "bucket": "test",
    "conditions": {
      "Authorization": [

    preBuildSteps: BuildSteps.() -> Unit = {},
) : BaseGradleBuildType(
        stage = stage,
        init = {
            this.id(performanceTestBuildSpec.asConfigurationId(model, "bucket${bucketIndex + 1}"))
            this.name = description
            val type = performanceTestBuildSpec.type
            val os = performanceTestBuildSpec.os
            val arch = performanceTestBuildSpec.arch

  fi
  echo "Upgraded pyenv version: $(pyenv --version)"
fi

# Scheduled nightly and release builds upload build artifacts (Pip packages,
# Libtensorflow archives) to GCS buckets. TFCI Mac VMs need to authenticate as
# a service account that has the right permissions to be able to do so.
set +x
if [[ -n "${GOOGLE_APPLICATION_CREDENTIALS:-}" ]]; then

		field, err = dc.ReadMapKeyPtr()
		if err != nil {
			err = msgp.WrapError(err)
			return
		}
		switch msgp.UnsafeString(field) {
		case "bk":
			z.Bucket, err = dc.ReadString()
			if err != nil {
				err = msgp.WrapError(err, "Bucket")
				return
			}
		case "pr":
			z.Prefix, err = dc.ReadString()
			if err != nil {
				err = msgp.WrapError(err, "Prefix")
				return
			}

// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package cmd

import (
	"errors"
	"testing"
	"time"

	"github.com/google/uuid"
	"github.com/minio/minio/internal/bucket/lifecycle"
)

func (x xlMetaV2) listFreeVersions(volume, path string) ([]FileInfo, error) {
	fivs, err := x.ListVersions(volume, path, true)
	if err != nil {
		return nil, err
	}
	n := 0

}

// Add latency t from object with the specified size.
func (l *LastMinuteHistogram) Add(size int64, t time.Duration) {
	l[sizeToTag(size)].add(t)
}

// GetAvgData will return the average for each bucket from the last time minute.
// The number of objects is also included.
func (l *LastMinuteHistogram) GetAvgData() [sizeLastElemMarker]AccElem {
	var res [sizeLastElemMarker]AccElem
	for i, elem := range l[:] {

	return quick.LoadConfig(configFile, globalEtcdClient, data)
}

func readConfigWithoutMigrate(ctx context.Context, objAPI ObjectLayer) (config.Config, error) {
	// Construct path to config.json for the given bucket.
	configFile := path.Join(minioConfigPrefix, minioConfigFile)

	configFiles := []string{
		getConfigFile(),
		getConfigFile() + ".deprecated",
		configFile,
	}

	newServerCfg := func() (config.Config, error) {

}

// GetBucketUsers - returns users (not STS or service accounts) that have access
// to the bucket. User is included even if a group policy that grants access to
// the bucket is disabled.
func (store *IAMStoreSys) GetBucketUsers(bucket string) (map[string]madmin.UserInfo, error) {
	if bucket == "" {
		return nil, errInvalidArgument
	}

	cache := store.rlock()
	defer store.runlock()

	VerifyFile(ctx context.Context, volume, path string, fi FileInfo) (*CheckPartsResp, error)
	StatInfoFile(ctx context.Context, volume, path string, glob bool) (stat []StatInfo, err error)
	ReadParts(ctx context.Context, bucket string, partMetaPaths ...string) ([]*ObjectPartInfo, error)
	ReadMultiple(ctx context.Context, req ReadMultipleReq, resp chan<- ReadMultipleResp) error
	CleanAbandonedData(ctx context.Context, volume string, path string) error

		writeResponse(w, http.StatusServiceUnavailable, nil, mimeNone)
		return nil
	}

	if !globalBucketMetadataSys.Initialized() {
		w.Header().Set(xhttp.MinIOServerStatus, "bucket-metadata-offline")
		writeResponse(w, http.StatusServiceUnavailable, nil, mimeNone)
		return nil
	}

	if !globalIAMSys.Initialized() {
		w.Header().Set(xhttp.MinIOServerStatus, "iam-offline")