Validate Seatable Webhooks with HMAC SHA256 Authentication

📌 Validate Seatable Webhooks with HMAC SHA256 Authentication This mini workflow is designed to securely validate incoming Seatable webhooks using HMAC SHA256 signature verification. 🔐 What it does: Listens for incoming Seatable webhook requests. Calculates a SHA256 HMAC hash of the raw request body using your shared secret. Compares the computed hash with the x-seatable-signature header (after removing the sha256= prefix). If the hashes match: responds with 200 OK and forwards the request to subsequent nodes. If the hashes don’t match: responds with 403 Forbidden. ⚠️ Important Notes: This workflow is provided as a template and is not intended to work standalone. Please duplicate it and int

Help me set up the n8n workflow "Validate Seatable Webhooks with HMAC SHA256 Authentication" (https://n8n.io/workflows/3439). It uses: Crypto. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.