curl --request POST \
  --url https://{tenant}.cubecloud.dev/api/v1/deployments/{deploymentId}/notifications/{id}/recipients \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "recipients": [
    {
      "channelId": "<string>",
      "channelName": "<string>",
      "email": "<string>",
      "embedTenantName": "<string>",
      "externalId": "<string>",
      "groups": [
        "<string>"
      ],
      "securityContext": {},
      "userAttributes": [
        {
          "name": "<string>",
          "value": "<string>"
        }
      ],
      "userId": 123
    }
  ]
}
'

{
  "createdRecipients": [
    {
      "channelId": "<string>",
      "channelName": "<string>",
      "email": "<string>",
      "embedTenantName": "<string>",
      "embedUserId": 123,
      "externalId": "<string>",
      "userId": 123
    }
  ],
  "unchangedRecipients": [
    {
      "channelId": "<string>",
      "channelName": "<string>",
      "email": "<string>",
      "embedTenantName": "<string>",
      "embedUserId": 123,
      "externalId": "<string>",
      "userId": 123
    }
  ],
  "updatedRecipients": [
    {
      "channelId": "<string>",
      "channelName": "<string>",
      "email": "<string>",
      "embedTenantName": "<string>",
      "embedUserId": 123,
      "externalId": "<string>",
      "userId": 123
    }
  ]
}