curl --request POST \
  --url https://api.tilt.io/api/v1/custom/org/{organization_uuid}/asset_classes/ \
  --header 'Content-Type: application/json' \
  --header 'X-Api-Key: <api-key>' \
  --data '
{
  "name": "<string>",
  "description": "<string>",
  "benchmark_index_identifier": "<string>",
  "index_uuid": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "tilt_uuid": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "alternative_etf_tilt_asset_ids": [
    "<string>"
  ]
}
'

{
  "uuid": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "name": "<string>",
  "description": "<string>",
  "benchmark_index_name": "<string>",
  "benchmark_index_identifier": "<string>",
  "index_name": "<string>",
  "index_uuid": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "tilt_name": "<string>",
  "tilt_uuid": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "alternative_etf_tilt_asset_ids": [
    "<string>"
  ],
  "created": "2023-11-07T05:31:56Z",
  "modified": "2023-11-07T05:31:56Z"
}