curl --request PUT \
  --url https://rest.staging.nickel.com/bill/{billId} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "internalNote": "<string>",
  "reference": "<string>",
  "s3Urls": [
    "<string>"
  ],
  "amountCents": 123,
  "dueDateEpochMillis": 123
}
'

{
  "id": "<string>",
  "amountDueInCents": 123,
  "totalAmountInCents": 123,
  "vendorId": "<string>",
  "vendorName": "<string>",
  "dueDate": "<string>",
  "reference": "<string>",
  "status": "<string>",
  "documents": [
    "<string>"
  ]
}