diff --git a/object/service.proto b/object/service.proto
index 4ce47ed..7242949 100644
--- a/object/service.proto
+++ b/object/service.proto
@@ -254,10 +254,10 @@ message HeadRequest {
 // 3. Check if `ObjectID` signature in `signature` field is correct
 message HeaderWithSignature {
   // Full object header
-  Header header = 1;
+  Header header = 1 [json_name = "header"];
 
   // Signed `ObjectID` to verify full header's authenticity
-  neo.fs.v2.refs.Signature signature = 2;
+  neo.fs.v2.refs.Signature signature = 2 [json_name = "signature"];
 }
 
 // Object HEAD response
diff --git a/object/types.proto b/object/types.proto
index 6b9792e..6f0be21 100644
--- a/object/types.proto
+++ b/object/types.proto
@@ -24,6 +24,7 @@ enum ObjectType {
 enum MatchType {
   // Unknown. Not used
   MATCH_TYPE_UNSPECIFIED = 0;
+
   // Full string match
   STRING_EQUAL = 1;
 }
@@ -38,14 +39,14 @@ message ShortHeader {
   uint64 creation_epoch = 2 [json_name = "creationEpoch"];
 
   // Object's owner
-  neo.fs.v2.refs.OwnerID owner_id = 3 [json_name = "owner"];
+  neo.fs.v2.refs.OwnerID owner_id = 3 [json_name = "ownerID"];
 
   // Type of the object payload content
-  ObjectType object_type = 4 [json_name = "type"];
+  ObjectType object_type = 4 [json_name = "objectType"];
 
   // Size of payload in bytes.
   // `0xFFFFFFFFFFFFFFFF` means `payload_length` is unknown
-  uint64 payload_length = 5 [json_name = "payloadSize"];
+  uint64 payload_length = 5 [json_name = "payloadLength"];
 }
 
 // Object Header
@@ -55,30 +56,30 @@ message Header {
   neo.fs.v2.refs.Version version = 1 [json_name = "version"];
 
   // Object's container
-  neo.fs.v2.refs.ContainerID container_id = 2 [json_name = "container"];
+  neo.fs.v2.refs.ContainerID container_id = 2 [json_name = "containerID"];
 
   // Object's owner
-  neo.fs.v2.refs.OwnerID owner_id = 3 [json_name = "owner"];
+  neo.fs.v2.refs.OwnerID owner_id = 3 [json_name = "ownerID"];
 
   // Object creation Epoch
   uint64 creation_epoch = 4 [json_name = "creationEpoch"];
 
   // Size of payload in bytes.
   // `0xFFFFFFFFFFFFFFFF` means `payload_length` is unknown
-  uint64 payload_length = 5 [json_name = "payloadSize"];
+  uint64 payload_length = 5 [json_name = "payloadLength"];
 
   // Hash of payload bytes
-  neo.fs.v2.refs.Checksum payload_hash = 6  [json_name = "payloadHash"];
+  neo.fs.v2.refs.Checksum payload_hash = 6 [json_name = "payloadHash"];
 
   // Type of the object payload content
-  ObjectType object_type = 7  [json_name = "type"];
+  ObjectType object_type = 7 [json_name = "objectType"];
 
   // Homomorphic hash of the object payload.
-  neo.fs.v2.refs.Checksum homomorphic_hash = 8 [json_name = "homoHash"];
+  neo.fs.v2.refs.Checksum homomorphic_hash = 8 [json_name = "homomorphicHash"];
 
   // Session token, if it was used during Object creation. Need it to verify
   // integrity and authenticity out of Request scope.
-  neo.fs.v2.session.SessionToken session_token = 9 [json_name = "token"];
+  neo.fs.v2.session.SessionToken session_token = 9 [json_name = "sessionToken"];
 
   // `Attribute` is a user-defined Key-Value metadata pair attached to the
   // object.
@@ -109,19 +110,19 @@ message Header {
     neo.fs.v2.refs.ObjectID parent = 1 [json_name = "parent"];
 
     // Identifier of the left split neighbor
-    neo.fs.v2.refs.ObjectID previous = 2[json_name = "previous"];
+    neo.fs.v2.refs.ObjectID previous = 2 [json_name = "previous"];
 
     // `signature` field of the parent object. Used to reconstruct parent.
     neo.fs.v2.refs.Signature parent_signature = 3[json_name = "parentSignature"];
 
     // `header` field of the parent object. Used to reconstruct parent.
-    Header parent_header = 4 [json_name = "header"];
+    Header parent_header = 4 [json_name = "parentHeader"];
 
     // List of identifiers of the objects generated by splitting current one.
     repeated neo.fs.v2.refs.ObjectID children = 5 [json_name = "children"];
   }
   // Position of the object in the split hierarchy
-  Split split = 11 [json_name = "Split"];
+  Split split = 11 [json_name = "split"];
 }
 
 // Object structure. Object is immutable and content-addressed. It means
@@ -129,7 +130,7 @@ message Header {
 // hash of header field, which contains hash of object's payload.
 message Object {
   // Object's unique identifier.
-  neo.fs.v2.refs.ObjectID object_id = 1 [json_name = "id"];
+  neo.fs.v2.refs.ObjectID object_id = 1 [json_name = "objectID"];
 
   // Signed object_id
   neo.fs.v2.refs.Signature signature = 2 [json_name = "signature"];