Task: Handle verification for Twitter webhook

n8n workflow JSON:
{"nodes":[{"name":"Webhook","type":"n8n-nodes-base.webhook","position":[460,300],"webhookId":"0db0a40c-e5d1-463f-8252-03599f1303e6","parameters":{"path":"0db0a40c-e5d1-463f-8252-03599f1303e6","options":{},"responseMode":"lastNode"},"typeVersion":1},{"name":"Crypto","type":"n8n-nodes-base.crypto","position":[660,300],"parameters":{"type":"SHA256","value":"={{$json[\"query\"][\"crc_token\"]}}","action":"hmac","secret":"API KEY SECRET","encoding":"base64"},"typeVersion":1},{"name":"Set","type":"n8n-nodes-base.set","position":[840,300],"parameters":{"values":{"string":[{"name":"response_token","value":"=sha256={{$json[\"data\"]}}"}]},"options":{},"keepOnlySet":true},"typeVersion":1}],"connections":{"Crypto":{"main":[[{"node":"Set","type":"main","index":0}]]},"Webhook":{"main":[[{"node":"Crypto","type":"main","index":0}]]}}}