Save External Document Input

{
    "externalDocumentId" : "id",
    "isAsync" : "false", 
    "metadata": {
        "sections" : [
            {
                "guid": "guid1",
                "name": "test1",
                "isReadonly": false
            },
            {
                "guid": "guid2",
                "name": "test2",
                "isReadonly": false
            }
        ],
        "objectReferences" :[
            {
                "objectType": "clause",
                "objectId": "clauseid1",
                "usages": {
                    "sectionIds": [
                        "guid1",
                        "guid2"
                    ],
                    "usedInDocument": true
                }
            },
            {
                "objectType": "clause",
                "objectId": "clauseid2",
                "usages": {
                    "sectionIds": [
                        "guid1",
                        "guid2"
                    ],
                    "usedInDocument": false // points to if this object is used in document as well without sections
                }
            }
        ]
    }
}