curl --request POST \
  --url https://api.privy.io/v1/wallets/{wallet_id}/rpc \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --header 'privy-app-id: <privy-app-id>' \
  --data '{
    "method": "eth_sign7702Authorization",
    "params": {
      "contract": "0x1234567890abcdef1234567890abcdef12345678",
      "chain_id": 1,
      "nonce": 0
    }
}'

{
  "method": "eth_sign7702Authorization",
  "data": {
    "authorization": {
      "contract": "0x1234567890abcdef1234567890abcdef12345678",
      "chain_id": 1,
      "nonce": 0,
      "r": "0x0db9c7bd881045cbba28c347de6cc32a653e15d7f6f2f1cec21d645f402a6419",
      "s": "0x6e877eb45d3041f8d2ab1a76f57f408b63894cfc6f339d8f584bd26efceae308",
      "y_parity": 1
    }
  }
}