curl --request POST \
  --url https://api.everhour.com/expenses \
  --header 'Content-Type: application/json' \
  --header 'X-Api-Key: <api-key>' \
  --data '
{
  "category": 236046,
  "date": "2019-04-04",
  "amount": 2278,
  "attachments": [
    123
  ],
  "billable": true,
  "details": "Transportation notes",
  "project": "as:333045610521453",
  "quantity": 17,
  "user": 6
}
'

{
  "amount": 2278,
  "attachments": [
    {
      "id": 514,
      "name": "avatar.jpg",
      "token": "9a04b8a1fb99cbfadf3386ad6a338c14"
    }
  ],
  "billable": true,
  "category": 236046,
  "date": "2019-04-04",
  "details": "Transportation notes",
  "id": 234718,
  "project": "as:333045610521453",
  "quantity": 17,
  "user": 6
}