How can i verify signature in header

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1

How can i verify signature in header

I use nowpayment. I made an http request to create payment. It uses a webhook as callback. Inside web hook i need to verify that call coming from now-payment. They use sha512 algorith to create signatures and send it in the header as x-nowpayments-sig. It can be regenerate with some secret. I have js code for it but it requires packages etc. How can i verify this signature?

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