curl --request POST \
  --url https://api.example.com/v1/sales/funnels/ \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "<string>",
  "extra": "<unknown>",
  "created_by": 123,
  "users": [
    123
  ]
}
'

{
  "id": 123,
  "name": "<string>",
  "stages": [
    123
  ],
  "created_at": "2023-11-07T05:31:56Z",
  "extra": "<unknown>",
  "created_by": 123,
  "users": [
    123
  ]
}