Team-managed project automation to change Preset Approvers based on custom field

[Bobby Arvanitakis]

Depending on a selected "Division" custom field, with options: Group X, Group Y.
I want a specific person added as a Preset Approver.

I managed to find the customfield_10700 id that stores the approvers for that Approval step (different approvers for different statuses).

In my automation, if Division = Group X, I want to populate the Preset approver field with the reporter (as an example):

{
    "fields": {
        "customfield_10700": [
            {
                "value": "<accountid>"
            }
        ]
    }
}

Where <accountid> is the approver's account id.

In my testing, if an approver is already in this custom field and I run this automation, the current approver is removed, but the new approver isn't added. The automation runs without reported errors.

Would love some help! :)

[Bobby Arvanitakis · Accepted solution]

Figured it out!

 {"update":{"customfield_10700":[{"set":[{"accountId":"5f241224cdb7b4001bd41227"}]}]}}

[Bobby Arvanitakis]

I've tried the following without success:

{"update":{"customfield_10700":[{"set":[{"approvers":"62b9844d268cac6e31c355ee"}]}]}}

{"update":{"customfield_10700":[{"set":[{"value":"62b9844d268cac6e31c355ee"}]}]}}

All run without errors, but the approver doesn't change.