Groovy script to send Slack Notifications

slackNotifier.groovy

#!/usr/bin/env groovy

def call(String buildResult) {
  if ( buildResult == "SUCCESS" ) {
    slackSend color: "good", message: "Job: ${env.JOB_NAME} with buildnumber ${env.BUILD_NUMBER} was successful"
  }
  else if( buildResult == "FAILURE" ) { 
    slackSend color: "danger", message: "Job: ${env.JOB_NAME} with buildnumber ${env.BUILD_NUMBER} was failed"
  }
  else if( buildResult == "UNSTABLE" ) { 
    slackSend color: "warning", message: "Job: ${env.JOB_NAME} with buildnumber ${env.BUILD_NUMBER} was unstable"
  }
  else {
    slackSend color: "danger", message: "Job: ${env.JOB_NAME} with buildnumber ${env.BUILD_NUMBER} its resulat was unclear"	
  }
}

Hi !
This is to send a message in slack channel via message: parameter of slackSend, can you please share an example using the blocks: parameter of slackSend ?
I have generated the block code from https://app.slack.com/block-kit-builder/ to send that to a slack but there is some syntax error with groovy script.

Sample block :
{
"blocks": [
{
"type": "section",
"text": {
"type": "mrkdwn",
"text": "New Paid Time Off request from <example.com|Fred Enriquez>\n\n<https://example.com|View request>"
}
}
]
}