curl --request POST \
  --url https://api.orderly.org/v1/register_account \
  --header 'Content-Type: application/json' \
  --data '
{
  "message": {
    "brokerId": "<string>",
    "chainId": 123,
    "timestamp": "<string>",
    "registrationNonce": "<string>",
    "chainType": "<string>"
  },
  "signature": "<string>",
  "userAddress": "<string>"
}
'

{
  "success": true,
  "data": {
    "account_id": "<string>"
  },
  "timestamp": 1702989203989
}