Has anyone had luck creating Purchase Orders through the API with multiple Approval levels?

I'm able to create Purchase Orders using the API without any issues. I can also create purchase orders with a single approval level. Where I'm struggling is when trying to create a purchase order with multiple approval levels. At this point I've run out of ideas and would love any input. Thanks!

What I've tried so far

I tried following the API documentation but haven't been having much luck.

https://apidoc.samanage.com/#tag/Purchase-Order/operation/createPurchaseOrder

"approval_levels_attributes": [
  {
    "id": "1",
    "approver_ids": "1, 2",
    "approval_condition": "1"
  }
],

With some trial and error, I was able to figure out the following:

I'm not sure how id is used, and leaving undefined still allows creating a PO with a single approval level.
approver_ids is a comma separated string of "group" ids for the different approvers.
approval_condition seems to be the "Only one approver", "All approvers", or "50% or more approvers"

I initially assumed each "level" would just be defined as a separate item in the list, but that actually doesn't work and sort of breaks the approvals, creating a duplicate of the Level 1 approval that the system ignores .

"approval_levels_attributes": [
    {
        "approver_ids": ""6712085",
        "approval_condition": 1
    },
    {
        "approver_ids": "6712085,6828711",
        "approval_condition": 1
    }
]

I also tried checking the network traffic when submitting from the web. Submitting a PO with these approval levels were submitted as a form with this attribute breakdown:

I tried resubmitting as a list of approval levels in the two following ways:

This payload actually ended up having the same error as submitting list the list of approvals above, with a duplicate Level 1 approval.

"approval_levels_attributes":{
    0: {
        "approver_ids": data.pop("approvers"),
        "approval_condition": 1
    },
    1: {
        "approver_ids": "6712085,6828711",
        "approval_condition": 1
    }
}

This payload, the closest to the actual documented payload, weirdly gave me a 404 error...

"approval_levels_attributes": [
    {
        "id": "0",
        "approver_ids": "6712085",
        "approval_condition": 1,
    },
    {
        "id": "1",
        "approver_ids": "6712085,6828711",
        "approval_condition": 1,
    },
]