Quick Start & FAQSQna Is There Anyway to Generate Uuid or an Random Id

See examples here in README Precisely as below for UUID(you can use ${RANDOM.NUMBER} too)-

{
  "scenarioName": "random_UUID",
  "steps": [
    {
      "name": "create_new_employee",
      "url": "http://localhost:9998/google-emp-services/home/employees",
      "operation": "POST",
      "request": {
        "body": {
          "id": "${RANDOM.UUID}", //<-- Everytime it creates unique uuid. See below example.
          "name": "Elen M"   
        }
      },
      "assertions": {
        "status": 201
      }
    }
  ]
}