1584 Manual HTTP Automation Webhook

{
  "name": "1584 Manual HTTP Automation Webhook",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "name": "FunctionItem",
      "type": "n8n-nodes-base.functionItem",
      "position": [
        450,
        300
      ],
      "parameters": {
        "functionCode": "// hashtag list\nconst Hashtags = [\n \"#techtwitter\",\n \"#n8n\"\n];\n\n// random output function\nconst randomHashtag = Hashtags[Math.floor(Math.random() * Hashtags.length)];\nitem.hashtag = randomHashtag;\nreturn item;"
      },
      "typeVersion": 1
    },
    {
      "name": "HTTP Request",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        650,
        300
      ],
      "parameters": {
        "url": "https://api.openai.com/v1/engines/text-davinci-001/completions",
        "options": {},
        "requestMethod": "POST",...