Activity created via api not able to get it via getAttribute function

[PawanSh1]

I have create ab activity via api and have added the metrics also and my request body is as below. After creating i can't even the Goal section in ui and also while using 

targetClient.getAttributes function i'm not getting the mbox data but if i create the same within ui i'm able to get it. Im using on-device-decisioning github example.

{
    "thirdPartyId": "dce8c3f8-7087-4846-92c6-ca368b00bc2e",
    "name": "Demo Engineering Feature Flags - API",
    "state": "approved",
    "priority": 0,
    "options": [
        {
            "optionLocalId": 2,
            "name": "Offer2",
            "offerId": 2004991,
            "offerTemplates": []
        },
        {
            "optionLocalId": 3,
            "name": "Offer3",
            "offerId": 2004990,
            "offerTemplates": []
        }
    ],
    "locations": {
        "mboxes": [
            {
                "locationLocalId": 0,
                "name": "demo-engineering-flags-ab",
                "audienceIds": [
                    623999
                ]
            }
        ],
        "selectors": []
    },
    "experiences": [
        {
            "experienceLocalId": 0,
            "name": "Experience A",
            "audienceIds": [],
            "visitorPercentage": 50,
            "optionLocations": [
                {
                    "locationLocalId": 0,
                    "optionLocalId": 2
                }
            ]
        },
        {
            "experienceLocalId": 1,
            "name": "Experience B",
            "audienceIds": [],
            "visitorPercentage": 50,
            "optionLocations": [
                {
                    "locationLocalId": 0,
                    "optionLocalId": 3
                }
            ]
        }
    ],
    "metrics": [
        {
            "metricLocalId": 32767,
            "name": "MY PRIMARY GOAL",
            "conversion": true,
            "engagement": "score",
            "action": {
                "type": "count_once"
            },
            "mboxes": [
                {
                    "name": "demo-engineering-flags-ab",
                    "successEvent": "mbox_shown"
                }
            ],
            "clickTrackSelectors": []
        }
    ],
    "reportingAudiences": [],
    "propertyIds": [
        4914
    ],
    "workspace": "606852004"
}