curl --request POST \
  --url https://v1.api.flux-os.com/integrations/lookups/entities \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --header 'x-user-id: <api-key>' \
  --data '
{
  "name": "<string>",
  "start_date": "2023-12-25",
  "entity": {
    "legal_name": "<string>"
  },
  "organization": {
    "name": "<string>"
  },
  "end_date": null
}
'

{
  "data": {
    "name": "<string>",
    "start_date": "2023-12-25",
    "id": "<string>",
    "entity": {
      "legal_name": "<string>",
      "id": "<string>"
    },
    "organization": {
      "name": "<string>",
      "id": "<string>"
    },
    "end_date": null
  }
}