Getting a different value from a Hmac-sha256 online generator tool and Java Code

Question

I would like to generate a signature from my Java code, this is my method:

public static String hmacWithJava(String algorithm, String data, String key)
            throws NoSuchAlgorithmException, InvalidKeyException {
        Mac mac = Mac.getInstance(algorithm);
        mac.init(new SecretKeySpec(key.getBytes(), algorithm));
        String hexFormatSignature = "sha256=" + HexFormat.of().formatHex(mac.doFinal(data.getBytes()));
        return hexFormatSignature;
    }

where

   algorithm="HmacSHA256"`

    key="testKey";

    data="{
      "action" : "created",
      "installation" : {
        "id" : 2,
        "account" : {
          "login" : "testUser",
          "type" : "User"
        }
      },
      "sender" : {
        "login" : "testUser",
        "type" : "User"
      }
    }"

hexFormatSignature="sha256=11e20c46886a8e681fd2a3ad0e3a100d42579e1cf95417dd27acc80cedadabd5"

If I put the same payload in the https://www.devglan.com/online-tools/hmac-sha256-online tool y got the next result: "11e20c46886a8e681fd2a3ad0e3a100d42579e1cf95417dd27acc80cedadabd5"

But this is not the correct signature, the correct one must be:"aef0567d41bb28abe34d9202cd019668a8b35f65dd1981d22a74de5c19823b6a"

The difference I have noticed is related with the json format, I mean the one generated from Jackson has less espaces o more enters that the one I am using manually and is generating the correct signature.

Left side is the one generated form Java code and right side the one that someone give me and its working.

This is the comparison between both text and they have the same values, but different indentation format, in fact if I add a space in the original payload I will have a different signature. Is there a way to solve this issue? Maybe I need to configure something to get the correct format from Java?

This is the manual payload, which is working:

{
  "action": "created",
   "installation" : {
       "id": 2,
        "account":{
            "login": "testUser",
            "type": "User"
         }
    },
    "sender" : {
        "login" : "testUser",
        "type" : "User"
    }
} 

I am using Jackson to get the Json String from the Payload:

String jsonStr = obj.writerWithDefaultPrettyPrinter().writeValueAsString(payload);

And my Payload object looks like this:

Payload{action='created', installation=model.Installation@3d121db3, sender=model.User@3b07a0d6}