diff --git a/README.md b/README.md
index 3229fb5..5f68639 100644
--- a/README.md
+++ b/README.md
@@ -61,3 +61,7 @@ Via `card-cli`
 card-cli external_public_key --parameter "key://external-signer-pkcs11:external_command/p384::hmac_enc:saHbpo0kKNk9m3y81qERoA:Yx6dB0hsT7MOXdwXrJ4t1g:5wDzlJf/qYHPo5oVcAykaUV8eTCFnSLb7n+AnLoaXVeJkih1BcBlZ8H01EB74I4qiCC95PWN4IIQOxLrPAigbhJ7l0rK62DV/DWS+TcdB+EqbyBi01z2cNRmznREITvlxjgc+YMshK7N/Pc6QjDzNIMP+8AEJyzOuFY5eK1hZihO3pz4ctakjAG3W5kvrW1rehdwfdV/qD8hZfO1nvhlaEnzRomUWn5bHcahjd5V4straxPS/mxNefp7y8dpDAxPLlQz2YPLfkspRoWU0q1NeYTw91dIvNpP"
 ```
 
+```shell
+card-cli external_sign --parameter "key://external-signer-pkcs11:external_command/p384::hmac_enc:saHbpo0kKNk9m3y81qERoA:Yx6dB0hsT7MOXdwXrJ4t1g:5wDzlJf/qYHPo5oVcAykaUV8eTCFnSLb7n+AnLoaXVeJkih1BcBlZ8H01EB74I4qiCC95PWN4IIQOxLrPAigbhJ7l0rK62DV/DWS+TcdB+EqbyBi01z2cNRmznREITvlxjgc+YMshK7N/Pc6QjDzNIMP+8AEJyzOuFY5eK1hZihO3pz4ctakjAG3W5kvrW1rehdwfdV/qD8hZfO1nvhlaEnzRomUWn5bHcahjd5V4straxPS/mxNefp7y8dpDAxPLlQz2YPLfkspRoWU0q1NeYTw91dIvNpP" --alg ES384 --message-base64 "$(echo 'hello world' | base64)"
+```
+