curl --request PUT \
  --url https://api.loyalty.dog/v2/giftcards/merchants/settings \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "programId": "<string>",
  "locationId": "<string>",
  "merchantId": "<string>"
}
'

{
  "id": "<string>",
  "merchantId": "5eb7cf5a86d9755df3a6c593",
  "name": "<string>",
  "platform": "<string>",
  "programId": "<string>",
  "active": true,
  "locationId": "<string>",
  "locationName": "<string>",
  "locations": [
    {
      "locationId": "<string>",
      "locationName": "<string>",
      "lastSeenAt": "<string>",
      "programId": "<string>"
    }
  ],
  "cashierId": "<string>",
  "terminalId": "<string>",
  "role": "<string>",
  "sessionToken": "<string>"
}