curl --request POST \
  --url https://{FUSION HOST}/api/spark/configurations/experiment \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '{
  "id": "<string>",
  "description": "<string>",
  "uniqueIdParameter": "<string>",
  "baseSignalsCollection": "<string>",
  "variants": [
    {
      "id": "<string>",
      "name": "<string>",
      "collection": "<string>",
      "queryPipeline": "<string>",
      "params": [
        {
          "key": "<string>",
          "value": "<string>",
          "policy": "replace"
        }
      ],
      "weight": 123
    }
  ],
  "automaticallyAdjustTraffic": true,
  "enabled": true,
  "startTimestamp": "2023-11-07T05:31:56Z",
  "runId": "<string>",
  "metrics": [
    {
      "name": "<string>",
      "description": "<string>",
      "jobId": "<string>",
      "binary": true,
      "primary": true,
      "type": "<string>"
    }
  ]
}'