curl --request POST \
  --url https://api.sequence.app/rpc/API/IsValidSignature \
  --header 'Content-Type: application/json' \
  --header 'X-Access-Key: <api-key>' \
  --data '{
  "chainId": "<string>",
  "walletAddress": "<string>",
  "digest": "<string>",
  "signature": "<string>"
}'

{
  "isValid": true
}