diff --git a/storage/manifest.go b/storage/manifest.go
index 895a112ec..000bc617c 100644
--- a/storage/manifest.go
+++ b/storage/manifest.go
@@ -6,6 +6,8 @@ import (
 	"fmt"
 	"strings"
 
+	"github.com/Sirupsen/logrus"
+
 	"github.com/docker/libtrust"
 
 	"github.com/docker/docker-registry/digest"
@@ -78,7 +80,7 @@ type Manifest struct {
 // SignedManifest. This typically won't be used within the registry, except
 // for testing.
 func (m *Manifest) Sign(pk libtrust.PrivateKey) (*SignedManifest, error) {
-	p, err := json.Marshal(m)
+	p, err := json.MarshalIndent(m, "", "   ")
 	if err != nil {
 		return nil, err
 	}
@@ -107,7 +109,7 @@ func (m *Manifest) Sign(pk libtrust.PrivateKey) (*SignedManifest, error) {
 // The public key of the first element in the chain must be the public key
 // corresponding with the sign key.
 func (m *Manifest) SignWithChain(key libtrust.PrivateKey, chain []*x509.Certificate) (*SignedManifest, error) {
-	p, err := json.Marshal(m)
+	p, err := json.MarshalIndent(m, "", "   ")
 	if err != nil {
 		return nil, err
 	}
@@ -148,6 +150,7 @@ type SignedManifest struct {
 func (sm *SignedManifest) Verify() ([]libtrust.PublicKey, error) {
 	js, err := libtrust.ParsePrettySignature(sm.Raw, "signatures")
 	if err != nil {
+		logrus.WithField("err", err).Debugf("(*SignedManifest).Verify")
 		return nil, err
 	}