salesforce側から操作して、MC経由でお客さまへ送信します
0.送信対象を事前にMCに登録する
1.DE準備
２．journeyの内容
３．salesforce側のAPI request code
	String clientId = 'xxx';
	        String clientSecret = 'xxx';
	        String tokenUrl = 'https://xxxx.auth.marketingcloudapis.com/v2/token';
	        
	        HttpRequest req = new HttpRequest();
	        req.setEndpoint(tokenUrl);
	        req.setMethod('POST');
	        req.setHeader('Content-Type', 'application/json');
	        
	        String body = '{"grant_type":"client_credentials","client_id":"' + clientId + '","client_secret":"' + clientSecret + '"}';
	        req.setBody(body);
	        
	        Http http = new Http();
	        HttpResponse res = http.send(req);
	        
	
	            Map<String, Object> responseMap = (Map<String, Object>) JSON.deserializeUntyped(res.getBody());
	
	
	
	Object accessToken =responseMap.get('access_token');
	system.debug(accessToken);
	// リクエストJSON
	        String smsReqJson = '{"ContactKey": "xxxx",'
	                          + '"EventDefinitionKey":"xxxx",'
	                          + '"Data": {'
	                          + '         "contactkey":"xxxx",'
	                          + '         "sentdate":"' + String.ValueofGmt(Datetime.now()) + '",'
	                          + '         "country":"JP",'
	                          + '         "phone":"xxxx",'
	                          + '         "name":"xxxx"'
	                          + '}}';  
	 
	        // エンドポイント
	        String endpoint2 = 'https://xxxx.rest.marketingcloudapis.com/interaction/v1/events';
	        // HTTPリクエスト
	        HttpRequest req2 = new HttpRequest();
	        req2.setEndpoint(endpoint2);
	        req2.setMethod('POST');
	        req2.setHeader('Content-Type', 'application/json');
	        req2.setHeader('Authorization', 'Bearer ' + String.valueof(accessToken));
	        req2.setBody(smsReqJson);
	
	
	Http http2 = new Http();
	        HttpResponse res2 = http2.send(req2);
	        
	        System.debug(res.getBody());