curl --request POST \
  --url https://api.embedreach.com/api/channel/accounts \
  --header 'Content-Type: application/json' \
  --data '{
  "channelIntegrationId": "<string>",
  "channelAccountMetadata": {
    "type": "reach-managed",
    "domainPrefix": "<string>"
  }
}'

{
  "success": true,
  "message": "<string>",
  "data": {
    "id": "<string>",
    "name": "<string>",
    "createdAt": "<string>",
    "channelAccountMetadata": {
      "type": "reach-managed",
      "baseDomain": "<string>",
      "dkimVerified": true,
      "verifiedReturnPath": true,
      "messageStream": "broadcast"
    }
  }
}