Can I use Json to build a template and integrate it to my app to make the Slackbot more presentable?

Question

The current template looks like this:

enter image description here

This is the code used to build this "Send secret message":

import (
    "fmt"
    "strings"

    "github.com/google/uuid"
    "github.com/pkg/errors"
    "github.com/slack-go/slack"
)

// SendMessage sends a message to the receiver through slack
func SendMessage(id uuid.UUID, sender string, receiver string, description string) error {
    username := strings.Split(receiver, "@")[0]
    _, _, err := rtm.PostMessage(
        "@"+username,
        slack.MsgOptionText(fmt.Sprintf(
            "*%s has shared a secret with you!* \n*Description:* %s "+
                "\nView the secret at https://whisper.sky/%s",
            sender,
            description,
            id), false),
        slack.MsgOptionAsUser(true),
    )

    if err != nil {
        return errors.Wrap(err, "sending message through slack")
    }

    return nil
}

Blockquote

However, on the slack Block Kit Builder they use Json, so my question is, can I edit the template to how I want in Json and import the Json into the code I have currently so it looks more like this:

enter image description here

Any help would be appreciated as I am new to this background so not sure what to change and where. Thanks.

This is the code from the block builder:

{
    "blocks": [
        {
            "type": "header",
            "text": {
                "type": "plain_text",
                "text": "{name} has sent you a secret!",
                "emoji": true
            }
        },
        {
            "type": "divider"
        },
        {
            "type": "section",
            "fields": [
                {
                    "type": "mrkdwn",
                    "text": "*Type:*\nPassword"
                },
                {
                    "type": "mrkdwn",
                    "text": "*For:*\nGitHub Service Account"
                },
                {
                    "type": "mrkdwn",
                    "text": "*Message:*\nHere's the password to the GitHub Service Account"
                },
                {
                    "type": "mrkdwn",
                    "text": "*Expires:*\nIn 7 Days"
                }
            ]
        },
        {
            "type": "divider"
        },
        {
            "type": "section",
            "text": {
                "type": "mrkdwn",
                "text": "*To access this secret visit http://whisper.int.discoott.sky.com/ *"
            },
            "accessory": {
                "type": "button",
                "text": {
                    "type": "plain_text",
                    "text": "Click Here",
                    "emoji": true
                },
                "value": "access_secret_button",
                "url": "https://whisper.int.discoott.sky.com/",
                "action_id": "button-action"
            }
        },
        {
            "type": "divider"
        },
        {
            "type": "context",
            "elements": [
                {
                    "type": "mrkdwn",
                    "text": "If you did not expect this secret, you can ignore it and allow it to expire."
                }
            ]
        }
    ]
}

I just do not know how to implement that code into my Go file.