diff --git a/pkg/morph/client/frostfsid/subject.go b/pkg/morph/client/frostfsid/subject.go
index 52ae98ba5..169be6bc5 100644
--- a/pkg/morph/client/frostfsid/subject.go
+++ b/pkg/morph/client/frostfsid/subject.go
@@ -13,7 +13,10 @@ import (
 	"github.com/nspcc-dev/neo-go/pkg/vm/vmstate"
 )
 
-const methodGetSubject = "getSubject"
+const (
+	methodGetSubject         = "getSubject"
+	methodGetSubjectExtended = "getSubjectExtended"
+)
 
 func (c *Client) GetSubject(addr util.Uint160) (*frostfsidclient.Subject, error) {
 	prm := client.TestInvokePrm{}
@@ -33,6 +36,24 @@ func (c *Client) GetSubject(addr util.Uint160) (*frostfsidclient.Subject, error)
 	return subj, nil
 }
 
+func (c *Client) GetSubjectExtended(addr util.Uint160) (*frostfsidclient.SubjectExtended, error) {
+	prm := client.TestInvokePrm{}
+	prm.SetMethod(methodGetSubjectExtended)
+	prm.SetArgs(addr)
+
+	res, err := c.client.TestInvoke(prm)
+	if err != nil {
+		return nil, fmt.Errorf("could not perform test invocation (%s): %w", methodGetSubject, err)
+	}
+
+	subj, err := parseSubjectExtended(res)
+	if err != nil {
+		return nil, fmt.Errorf("could not parse test invocation result (%s): %w", methodGetSubject, err)
+	}
+
+	return subj, nil
+}
+
 func parseSubject(res []stackitem.Item) (*frostfsidclient.Subject, error) {
 	if ln := len(res); ln != 1 {
 		return nil, fmt.Errorf("unexpected stack item count (%s): %d", methodGetSubject, ln)
@@ -79,6 +100,64 @@ func parseSubject(res []stackitem.Item) (*frostfsidclient.Subject, error) {
 	return &subj, nil
 }
 
+func parseSubjectExtended(res []stackitem.Item) (*frostfsidclient.SubjectExtended, error) {
+	if ln := len(res); ln != 1 {
+		return nil, fmt.Errorf("unexpected stack item count (%s): %d", methodGetSubject, ln)
+	}
+
+	structArr, err := client.ArrayFromStackItem(res[0])
+	if err != nil {
+		return nil, fmt.Errorf("could not get item array of container (%s): %w", methodGetSubject, err)
+	}
+
+	var subj frostfsidclient.SubjectExtended
+
+	subj.PrimaryKey, err = unwrap.PublicKey(makeValidRes(structArr[0]))
+	if err != nil {
+		return nil, err
+	}
+
+	if !structArr[1].Equals(stackitem.Null{}) {
+		subj.AdditionalKeys, err = unwrap.ArrayOfPublicKeys(makeValidRes(structArr[1]))
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	if !structArr[2].Equals(stackitem.Null{}) {
+		subj.Namespace, err = unwrap.UTF8String(makeValidRes(structArr[2]))
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	if !structArr[3].Equals(stackitem.Null{}) {
+		subj.Name, err = unwrap.UTF8String(makeValidRes(structArr[3]))
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	subj.KV, err = parseMap(structArr[4])
+	if err != nil {
+		return nil, err
+	}
+
+	if !structArr[5].Equals(stackitem.Null{}) {
+		groupItems, ok := structArr[5].Value().([]stackitem.Item)
+		if !ok {
+			return nil, errors.New("invalid groups field")
+		}
+
+		subj.Groups, err = parseGroups(groupItems)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	return &subj, nil
+}
+
 func makeValidRes(item stackitem.Item) (*result.Invoke, error) {
 	return &result.Invoke{
 		Stack: []stackitem.Item{item},
@@ -116,3 +195,54 @@ func parseMap(item stackitem.Item) (map[string]string, error) {
 
 	return res, nil
 }
+
+func parseGroups(items []stackitem.Item) ([]*frostfsidclient.Group, error) {
+	var err error
+	res := make([]*frostfsidclient.Group, len(items))
+
+	for i := 0; i < len(items); i++ {
+		arr, ok := items[i].Value().([]stackitem.Item)
+		if !ok {
+			return nil, errors.New("invalid group type")
+		}
+		res[i], err = parseGroup(arr)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	return res, nil
+}
+
+func parseGroup(structArr []stackitem.Item) (*frostfsidclient.Group, error) {
+	if len(structArr) < 4 {
+		return nil, errors.New("invalid response group struct")
+	}
+
+	groupID, err := structArr[0].TryInteger()
+	if err != nil {
+		return nil, err
+	}
+
+	name, err := structArr[1].TryBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	namespace, err := structArr[2].TryBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	kvs, err := parseMap(structArr[3])
+	if err != nil {
+		return nil, err
+	}
+
+	return &frostfsidclient.Group{
+		ID:        groupID.Int64(),
+		Name:      string(name),
+		Namespace: string(namespace),
+		KV:        kvs,
+	}, nil
+}