Task: Add new leads in Lemlist from Airtable

n8n workflow JSON:
{"nodes":[{"name":"Airtable","type":"n8n-nodes-base.airtable","position":[440,320],"parameters":{"operation":"list","additionalOptions":{}},"credentials":{"airtableApi":"Airtable Credentials n8n"},"typeVersion":1},{"name":"Lemlist","type":"n8n-nodes-base.lemlist","position":[640,320],"parameters":{"email":"={{$json[\"fields\"][\"Email\"]}}","resource":"lead","campaignId":"cam_H5pYEryq6mRKBiy5v","additionalFields":{"firstName":"={{$json[\"fields\"][\"Name\"]}}"}},"credentials":{"lemlistApi":"Lemlist API Credentials"},"typeVersion":1},{"name":"Lemlist1","type":"n8n-nodes-base.lemlist","position":[840,320],"parameters":{"email":"={{$node[\"Airtable\"].json[\"fields\"][\"Email\"]}}","resource":"lead","operation":"get"},"credentials":{"lemlistApi":"Lemlist API Credentials"},"typeVersion":1}],"connections":{"Lemlist":{"main":[[{"node":"Lemlist1","type":"main","index":0}]]},"Airtable":{"main":[[{"node":"Lemlist","type":"main","index":0}]]}}}