curl --request POST \
  --url 'https://api.stateset.com/api/v1/payment-obligations/{id}/bills' \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
  "bill_id": "string"
}'

{
  "amount": "string",
  "amount_paid": "string",
  "currency": "string",
  "due_date": "string",
  "id": "string",
  "number": "string",
  "outstanding": "string",
  "status": "string",
  "supplier_id": "string"
}