I'm using solana API and as a result of one function I get such response:

{
  blockTime: 1646251782,
  confirmationStatus: 'finalized',
  err: null,
  memo: null,
  signature: 'xyz',
  slot: 123192670
}

As you can see, there is blockTime field, and I want to extract value from it. When I was doing it with moment:

console.log(moment(1646251782).toISOString())

I got 1970 year, but it's incorrect, and I check this on solana explorer, and there was normal time. How can I get normal date or what do I do wrong?