Task: Zabbix Voice Notification System with TWILIO and N8N

n8n workflow JSON:
{"id":"33","name":"N8N Español - Sistema avisos voz TWILIO","nodes":[{"name":"Webhook Zabbix","type":"n8n-nodes-base.webhook","color":"#F41505","notes":"recibir datos de zabbix","position":[430,170],"webhookId":"66c4e210-d0e5-4645-a8b0-9295cfa25bb1","parameters":{"path":"916f4c31aaa35d6b867dae9a7f54270d","options":{},"httpMethod":"POST"},"notesInFlow":true,"typeVersion":1},{"name":"API Call","type":"n8n-nodes-base.httpRequest","notes":"Consume twilio API","position":[770,170],"parameters":{"url":"={{$node[\"Set\"].json[\"APICALL\"]}}","options":{"bodyContentType":"form-urlencoded"},"requestMethod":"POST","authentication":"basicAuth","responseFormat":"string","bodyParametersUi":{"parameter":[{"name":"Twiml","value":"=<Response>\n<Say voice=\"Polly.Conchita\" language=\"es-ES\" loop=\"3\">{{$node[\"Set\"].json[\"Mensaje\"]}}</Say>\n</Response>"},{"name":"To","value":"={{$node[\"Set\"].json[\"phone\"]}}"},{"name":"From","value":"={{$node[\"Set\"].json[\"From\"]}}"}]}},"notesInFlow":true,"typeVersion":1},{"name":"Set","type":"n8n-nodes-base.set","notes":"Configuración","position":[610,170],"parameters":{"values":{"string":[{"name":"TWILIO_ACCOUNT_SID","value":"TWILIO_ACCOUNT_SID"},{"name":"From","value":"telefono"},{"name":"APICALL","value":"= https://api.twilio.com/2010-04-01/Accounts/{{$parameter[\"values\"][\"string\"][0][\"value\"]}}/Calls.json"},{"name":"Mensaje","value":"=Hola, hay una alerta en el servidor {{$node[\"Webhook Zabbix\"].json[\"body\"][\"server\"]}} , la alerta es {{$node[\"Webhook Zabbix\"].json[\"body\"][\"message\"]}}"},{"name":"phone","value":"={{$node[\"Webhook Zabbix\"].json[\"body\"][\"phone\"]}}"}]},"options":{}},"notesInFlow":true,"typeVersion":1}],"active":true,"settings":{},"connections":{"Set":{"main":[[{"node":"API Call","type":"main","index":0}]]},"Webhook Zabbix":{"main":[[{"node":"Set","type":"main","index":0}]]}}}