Example datafile in option 5 format (based on https://cdn.optimizely.com/json/8249098549.json)

option5_datafile.json

{
  "version": "2",
  "projectId": "8249098549",
  "experiments": [
    {
      "status": "Running",
      "audienceIds": [],
      "variations": [  
        {
          "id": "8263164490",
          "key": "var1"    
        },
        {
          "id": "8250839728",
          "key": "var2"
        }
      ],                 
      "id": "8255840454",
      "key": "demo_exp",
      "layerId": "8258485258",
      "trafficAllocation": [
        {
          "entityId": "8263164490",
          "endOfRange": 5000
        },
        {
          "entityId": "8250839728",
          "endOfRange": 10000
        }
      ],
      "forcedVariations": {}
    }
  ],
  "audiences": [],
  "groups": [
    {
      "policy": "random",
      "trafficAllocation": [
        {
          "entityId": "8255840454",
          "endOfRange": 4500
        }
      ],
      "id": "8256890871"
    }
  ],
  "attributes": [],
  "revision": "6",
  "events": [],
  "accountId": "1592310167"
}