diff --git a/swift-secure-enclave-tool-v2.swift b/swift-secure-enclave-tool-v2.swift
index 859c647..238faf7 100644
--- a/swift-secure-enclave-tool-v2.swift
+++ b/swift-secure-enclave-tool-v2.swift
@@ -75,12 +75,7 @@ func parseComputeP256EcSignRequest() -> ComputeP256EcSignRequest? {
     )
 }
 
-struct ExternalSignRequest {
-    var dataRepresentationBase64: String
-    var messageBase64: String
-}
-
-func parseExternalSignRequest() -> ExternalSignRequest? {
+func parseExternalSignRequest() -> ComputeP256EcSignRequest? {
     var algOpt: String?
     var dataRepresentationBase64Opt: String?
     var messageBase64Opt: String?
@@ -119,7 +114,7 @@ func parseExternalSignRequest() -> ExternalSignRequest? {
         exitError("parameter --message-base64 required.")
         return nil
     }
-    return ExternalSignRequest(
+    return ComputeP256EcSignRequest(
         dataRepresentationBase64: dataRepresentationBase64,
         messageBase64: messageBase64
     )
@@ -514,6 +509,12 @@ if (command == "external_public_key") {
     exitOkWithJson(ExternalPublicKeyResponse(success: true, public_key_base64: response.public_key_base64))
 }
 
+if (command == "external_sign") {
+    let request = parseExternalSignRequest()!;
+    let response =  computeSecureEnclaveP256Ecsign(request: request)
+    exitOkWithJson(response)
+}
+
 if (command == "version") {
     exitOkWithJson(VersionResponse(success: true, version: "2.0.0-20250428"))
 }