curl --request PATCH \
  --url https://v1.api.flux-os.com/contracts/{id}/pricing-provisions/{pricing_provision_id} \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --header 'x-user-id: <api-key>' \
  --data '
{
  "type": "<unknown>",
  "fee": "<unknown>",
  "description": null
}
'

{
  "id": "<string>",
  "type": {
    "name": "<string>",
    "short_code": "<string>",
    "id": "<string>"
  },
  "contract": {
    "external_id": "<string>",
    "id": "<string>"
  },
  "description": null,
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z",
  "fee": {
    "type": "<unknown>",
    "fee_category": "<unknown>",
    "currency": "<unknown>",
    "id": "<string>",
    "amount": null,
    "transport_leg": "<unknown>",
    "measurement_unit": "<unknown>",
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z"
  },
  "groups": [
    {
      "id": "<string>",
      "provision": {
        "type": "<unknown>",
        "contract": "<unknown>",
        "fee": "<unknown>",
        "id": "<string>",
        "description": null,
        "created_at": "2023-11-07T05:31:56Z",
        "updated_at": "2023-11-07T05:31:56Z"
      },
      "parent_group": "<unknown>",
      "logical_operator": {
        "name": "<string>",
        "symbol": "<string>",
        "id": "<string>"
      },
      "created_at": "2023-11-07T05:31:56Z",
      "updated_at": "2023-11-07T05:31:56Z",
      "conditions": [
        {
          "value": 123,
          "id": "<string>",
          "measurement_property": {
            "name": "<string>",
            "short_code": "<string>",
            "id": "<string>"
          },
          "measurement_unit": {
            "name": "<string>",
            "abbreviation": "<string>",
            "id": "<string>",
            "html_symbol": null
          },
          "comparison_operator": {
            "name": "<string>",
            "symbol": "<string>",
            "id": "<string>"
          },
          "created_at": "2023-11-07T05:31:56Z",
          "updated_at": "2023-11-07T05:31:56Z"
        }
      ]
    }
  ]
}