Queues a background job to perform bulk actions on up to 100 custom object records per single request. Takes a `job` object with two nested fields: * `action`, one of: * `"create"` * `"delete"` * `"delete_by_external_id"` * `"create_or_update_by_external_id"` * `"create_or_update_by_name"` * `"update"` * `items` * For a `"create"` action, an array of JSON objects representing the custom object records being created * For a `"delete"` action, an array of strings representing Zendesk record ids * For a `"delete_by_external_id"` action, an array of strings representing external ids * For a `"create_or_update_by_external_id"` action, an array of JSON objects representing the custom object records being created or updated by external id * For a `"create_or_update_by_name"` action, an array of JSON objects representing the custom object records being created or updated by n