diff --git a/acl/types.proto b/acl/types.proto
index 9a38775..ae29abc 100644
--- a/acl/types.proto
+++ b/acl/types.proto
@@ -133,3 +133,34 @@ message EACLTable {
   // Records carries list of extended ACL rule records.
   repeated EACLRecord records = 2 [json_name="Records"];
 }
+
+// BearerToken has information about request ACL rules with limited lifetime
+message BearerToken {
+  // Bearer Token body
+  message Body {
+    // EACLTable carries table of extended ACL rules
+    EACLTable eacl_table = 1;
+
+    // OwnerID carries identifier of the token owner
+    neo.fs.v2.refs.OwnerID owner_id = 2;
+
+    // Lifetime parameters of the token. Filed names taken from rfc7519.
+    message TokenLifetime {
+      // Expiration Epoch
+      uint64 exp = 1;
+
+      // Not valid before Epoch
+      uint64 nbf = 2;
+
+      // Issued at Epoch
+      uint64 iat = 3;
+    }
+    // Token expiration and valid time period parameters
+    TokenLifetime lifetime = 3;
+  }
+  // Bearer Token body
+  Body body = 1;
+
+  // Signature of BearerToken body
+  neo.fs.v2.refs.Signature signature = 2;
+}
diff --git a/container/service.proto b/container/service.proto
index 95c1668..5c08c40 100644
--- a/container/service.proto
+++ b/container/service.proto
@@ -50,7 +50,7 @@ message PutRequest {
     container.Container container = 1;
 
     //Signature of stable-marshalled container according to RFC-6979.
-    neo.fs.v2.service.Signature signature =2;
+    neo.fs.v2.refs.Signature signature =2;
   }
   // Body of container put request message.
   Body body = 1;
@@ -94,7 +94,7 @@ message DeleteRequest {
     neo.fs.v2.refs.ContainerID container_id = 1;
 
     // Signature of container id according to RFC-6979.
-    neo.fs.v2.service.Signature signature = 2;
+    neo.fs.v2.refs.Signature signature = 2;
   }
   // Body of container delete request message.
   Body body = 1;
@@ -216,7 +216,7 @@ message SetExtendedACLRequest {
     neo.fs.v2.acl.EACLTable eacl = 1;
 
     // Signature of stable-marshalled Extended ACL according to RFC-6979.
-    neo.fs.v2.service.Signature signature = 2;
+    neo.fs.v2.refs.Signature signature = 2;
   }
   // Body of set extended acl request message.
   Body body = 1;
@@ -278,7 +278,7 @@ message GetExtendedACLResponse {
     neo.fs.v2.acl.EACLTable eacl = 1;
 
     // Signature of stable-marshalled Extended ACL according to RFC-6979.
-    neo.fs.v2.service.Signature signature = 2;
+    neo.fs.v2.refs.Signature signature = 2;
   }
   // Body of get extended acl response message.
   Body body = 1;
diff --git a/object/service.proto b/object/service.proto
index 1fd03a0..67d41ed 100644
--- a/object/service.proto
+++ b/object/service.proto
@@ -85,7 +85,7 @@ message GetResponse {
       neo.fs.v2.refs.ObjectID object_id = 1;
 
       // Object signature
-      neo.fs.v2.service.Signature signature =2;
+      neo.fs.v2.refs.Signature signature =2;
 
       // Object header.
       Header header = 3;
@@ -122,7 +122,7 @@ message PutRequest {
       neo.fs.v2.refs.ObjectID object_id = 1;
 
       // Object signature, were available
-      neo.fs.v2.service.Signature signature =2;
+      neo.fs.v2.refs.Signature signature =2;
 
       // Header of the object to save in the system.
       Header header = 3;
diff --git a/object/types.proto b/object/types.proto
index 7324d6c..356ad8b 100644
--- a/object/types.proto
+++ b/object/types.proto
@@ -100,7 +100,7 @@ message Header {
     neo.fs.v2.refs.ObjectID previous = 2;
 
     // `signature` field of the parent object. Used to reconstruct parent.
-    neo.fs.v2.service.Signature parent_signature = 3;
+    neo.fs.v2.refs.Signature parent_signature = 3;
 
     // `header` field of the parent object. Used to reconstruct parent.
     Header parent_header = 4;
@@ -121,7 +121,7 @@ message Object {
   neo.fs.v2.refs.ObjectID object_id = 1;
 
   // Signed object_id
-  neo.fs.v2.service.Signature signature = 2;
+  neo.fs.v2.refs.Signature signature = 2;
 
   // Object metadata headers
   Header header = 3;
diff --git a/refs/types.proto b/refs/types.proto
index 1f190a9..a17571d 100644
--- a/refs/types.proto
+++ b/refs/types.proto
@@ -39,3 +39,11 @@ message Version {
   // Minor API version.
   uint32 minor = 2;
 }
+
+// Signature of something in NeoFS
+message Signature {
+  // Public key used for signing.
+  bytes key = 1;
+  // Signature
+  bytes sign = 2;
+}
diff --git a/service/types.proto b/service/types.proto
index 85cf208..f657d5f 100644
--- a/service/types.proto
+++ b/service/types.proto
@@ -17,18 +17,6 @@ message XHeader {
   string value = 2;
 }
 
-// Lifetime parameters of the token. Filed names taken from rfc7519.
-message TokenLifetime {
-  // Expiration Epoch
-  uint64 exp = 1;
-
-  // Not valid before Epoch
-  uint64 nbf = 2;
-
-  // Issued at Epoch
-  uint64 iat = 3;
-}
-
 // Context information for Session Tokens related to ObjectService requests
 message ObjectSessionContext {
   // Object request verbs
@@ -74,6 +62,17 @@ message SessionToken {
     // OwnerID carries identifier of the session initiator.
     neo.fs.v2.refs.OwnerID owner_id = 2;
 
+    // Lifetime parameters of the token. Filed names taken from rfc7519.
+    message TokenLifetime {
+      // Expiration Epoch
+      uint64 exp = 1;
+
+      // Not valid before Epoch
+      uint64 nbf = 2;
+
+      // Issued at Epoch
+      uint64 iat = 3;
+    }
     // Lifetime is a lifetime of the session
     TokenLifetime lifetime = 3;
 
@@ -90,27 +89,7 @@ message SessionToken {
   Body body = 1;
 
   // Signature is a signature of session token information
-  Signature signature = 2;
-}
-
-// BearerToken has information about request ACL rules with limited lifetime
-message BearerToken {
-  // Bearer Token body
-  message Body {
-    // EACLTable carries table of extended ACL rules
-    neo.fs.v2.acl.EACLTable eacl_table = 1;
-
-    // OwnerID carries identifier of the token owner
-    neo.fs.v2.refs.OwnerID owner_id = 2;
-
-    // Token expiration and valid time period parameters
-    TokenLifetime lifetime = 3;
-  }
-  // Bearer Token body
-  Body body = 1;
-
-  // Signature of BearerToken body
-  Signature signature = 2;
+  neo.fs.v2.refs.Signature signature = 2;
 }
 
 // Information about the request
@@ -131,7 +110,7 @@ message RequestMetaHeader {
   SessionToken session_token = 5;
 
   // Bearer is a Bearer token of the request
-  BearerToken bearer_token = 6;
+  neo.fs.v2.acl.BearerToken bearer_token = 6;
 
   // RequestMetaHeader of the origin request.
   RequestMetaHeader origin = 7;
@@ -155,22 +134,15 @@ message ResponseMetaHeader {
   ResponseMetaHeader origin = 5;
 }
 
-// Signature of something in NeoFS
-message Signature {
-  // Public key used for signing.
-  bytes key = 1;
-  // Signature
-  bytes sign = 2;
-}
 
 // Verification info for request signed by all intermediate nodes
 message RequestVerificationHeader {
   // Request Body signature. Should be generated once by request initiator.
-  Signature body_signature = 1;
+  neo.fs.v2.refs.Signature body_signature = 1;
   // Request Meta signature is added and signed by any intermediate node
-  Signature meta_signature = 2;
+  neo.fs.v2.refs.Signature meta_signature = 2;
   // Sign previous hops
-  Signature origin_signature = 3;
+  neo.fs.v2.refs.Signature origin_signature = 3;
 
   // Chain of previous hops signatures
   RequestVerificationHeader origin = 4;
@@ -179,11 +151,11 @@ message RequestVerificationHeader {
 // Verification info for response signed by all intermediate nodes
 message ResponseVerificationHeader {
   // Response Body signature. Should be generated once by answering node.
-  Signature body_signature = 1;
+  neo.fs.v2.refs.Signature body_signature = 1;
   // Response Meta signature is added and signed by any intermediate node
-  Signature meta_signature = 2;
+  neo.fs.v2.refs.Signature meta_signature = 2;
   // Sign previous hops
-  Signature origin_signature = 3;
+  neo.fs.v2.refs.Signature origin_signature = 3;
 
   // Chain of previous hops signatures
   ResponseVerificationHeader origin = 4;
diff --git a/session/service.proto b/session/service.proto
index b8bd37e..f04ebb7 100644
--- a/session/service.proto
+++ b/session/service.proto
@@ -20,9 +20,8 @@ message CreateRequest {
   message Body {
     // Carries an identifier of a session initiator.
     neo.fs.v2.refs.OwnerID owner_id = 1;
-
-    // Carries a lifetime of the session.
-    neo.fs.v2.service.TokenLifetime lifetime = 2;
+    // Expiration Epoch
+    uint64 expiration = 2;
   }
   // Body of create session token request message.
   Body body = 1;