curl --request POST \
  --url https://api.openformat.tech/v1/transactions/execute \
  --header 'Content-Type: application/json' \
  --header 'X-API-KEY: <api-key>' \
  --data '{
  "chain": "arbitrum-sepolia",
  "signed_transaction": "0x02f901b4827a69......"
}'

{
  "status": "success",
  "transactionHash": "0xd6c495a1e4c121aead3888f10fc174fd9acfa71c639bb2fe6fc94e47ae5e815a",
  "blockExplorerUrl": "https://mumbai.polygonscan.com/tx/0xd6c495a1e4c121aead3888f10fc174fd9acfa71c639bb2fe6fc94e47ae5e815a"
}