curl --request GET \
  --url https://{FUSION HOST}/api/collections

[
  {
    "id": "<string>",
    "createdAt": "2023-11-07T05:31:56Z",
    "searchClusterId": "<string>",
    "commitWithin": 123,
    "features": {},
    "compositeIdSpec": {
      "routeKey1Field": "<string>",
      "routeKey1Bits": 123,
      "routeKey2Field": "<string>",
      "routeKey2Bits": 123
    },
    "solrParams": {
      "name": "<string>",
      "numShards": 123,
      "replicationFactor": 123,
      "collection.configName": "<string>"
    },
    "modifiedAt": "2023-11-07T05:31:56Z",
    "type": "DATA",
    "relatedCollectionId": "<string>",
    "metadata": {}
  }
]