I have the following script, my question is given after the script.

<script type="application/ld+json">
 {
  "@context": "http://schema.org/",
  "@type": "Product",
  "name": "Bat,

  "aggregateRating": {
    "@type": "AggregateRating",
    "ratingValue": "4.9",
    "ratingCount": "77"
  },
  "offers": {
    "@type": "AggregateOffer",
    "lowPrice": "5.76",
    "highPrice": "8",
    "availability": "http://schema.org/InStock",
    "priceCurrency": "USD"
  }
}

I want update ratingValue and ratingCount