curl --request POST \
  --url https://api.turnkey.com/public/v1/submit/sign_transaction \
  --header 'Accept: application/json' \
  --header 'Content-Type: application/json' \
  --header "X-Stamp: <YOUR_API_KEY.YOUR_API_SECRET>" \
  --data '{
    "type": "ACTIVITY_TYPE_SIGN_TRANSACTION_V2",
    "timestampMs": "<string> (e.g. 1746736509954)",
    "organizationId": "<string> (Your Organization ID)",
    "parameters": {
        "signWith": "<string>",
        "unsignedTransaction": "<string>",
        "type": "<TRANSACTION_TYPE_ETHEREUM>"
    }
}'

{
  "activity": {
    "id": "<activity-id>",
    "status": "ACTIVITY_STATUS_COMPLETED",
    "type": "ACTIVITY_TYPE_SIGN_TRANSACTION_V2",
    "organizationId": "<organization-id>",
    "timestampMs": "<timestamp> (e.g. 1746736509954)",
    "result": {
      "activity": {
        "type": "<string>",
        "intent": {
          "signTransactionIntent": {
            "privateKeyId": "<string>",
            "unsignedTransaction": "<string>",
            "type": "<TRANSACTION_TYPE_ETHEREUM>"
          }
        },
        "result": {
          "signTransactionResult": {
            "signedTransaction": "<string>"
          }
        }
      }
    }
  }
}