BulkAssociationCreateRequest

{
    "associations": [
        {
            "advertiserId": "123e4567-e89b-12d3-a456-426614174000",
            "userIds": [
                "123e4567-e89b-12d3-a456-426614174001",
                "123e4567-e89b-12d3-a456-426614174002"
            ]
        },
        {
            "advertiserId": "123e4567-e89b-12d3-a456-426614174003",
            "userIds": [
                "123e4567-e89b-12d3-a456-426614174004"
            ]
        }
    ]
}