The Airtable bulk update module in Integromat expects an array of records, where each record is an object containing the fields to be updated. The structure of the record list array should be as follows:
The array should contain multiple objects, each representing a record to be updated.
Each record object should have an “id” property with the ID of the record to be updated.
Each record object should have a “fields” property, which is an object containing the fields to be updated, with field names as keys and values as values.
The “fields” object can contain multiple field updates for each record.
Just use an array aggregator module.
It has an option to choose the target data structure. Feed it with datas and it will generate the correct records list