curl --request POST \
  --url https://mm-api.merchantspring.io/channels \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "filter": {
    "marketplaces": [
      "<string>"
    ],
    "countryCodes": [
      "<string>"
    ]
  }
}
'

[
  {
    "channelId": "<string>",
    "merchantId": "<string>",
    "marketplace": "<string>",
    "countryCode": "<string>",
    "displayName": "<string>",
    "hasAdvertisingConnected": true
  }
]