curl --request POST \
  --url https://api.relay.link/execute \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <x-api-key>' \
  --data '{
  "executionKind": "rawCalls",
  "data": {
    "chainId": 123,
    "to": "<string>",
    "data": "<string>",
    "value": "<string>",
    "authorizationList": [
      {
        "chainId": 123,
        "address": "<string>",
        "nonce": 123,
        "yParity": 123,
        "r": "<string>",
        "s": "<string>"
      }
    ]
  },
  "executionOptions": {
    "referrer": "<string>",
    "subsidizeFees": true
  },
  "requestId": "<string>"
}'

{
  "message": "Transaction submitted",
  "requestId": "0xabc123..."
}