curl --request PATCH \
  --url https://sandbox.api.fin.com/v1/customers/{customer_id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "ownership_documents": [
    {
      "type": "PROOF_OF_SIGNATORY_AUTHORITY",
      "description": "Shareholder Registry",
      "files": [
        {
          "uri": "/AbAcQ4hn_0652746727639.pdf"
        }
      ]
    }
  ],
  "formation_documents": [
    {
      "type": "REGISTRATION_DOCUMENT",
      "description": "Certificate of Incorporation",
      "files": [
        {
          "uri": "/AbAcQ4hn_0652746727637.pdf"
        }
      ]
    }
  ],
  "supporting_documents": [
    {
      "type": "PROOF_OF_SOURCE_OF_FUNDS",
      "description": "Proof of source of funds doc",
      "files": [
        {
          "uri": "/PoAdef45_0652746727640.pdf"
        }
      ]
    }
  ],
  "associated_party_attachments": [
    {
      "associated_party_id": "f6b13e01-044a-4f74-a70b-d5f66b6449af",
      "identifying_documents": [
        {
          "type": "PASSPORT",
          "number": "A12345678",
          "country": "USA",
          "issue_date": "2020-01-15",
          "expiry_date": "2030-01-15",
          "files": [
            {
              "uri": "/AbAcQ4hn_0652746727637.pdf"
            }
          ]
        },
        {
          "type": "DRIVERS_LICENSE",
          "number": "DL987654321",
          "country": "USA",
          "issue_date": "2019-06-01",
          "expiry_date": "2029-06-01",
          "files": [
            {
              "side": "FRONT",
              "uri": "/AbAcQ4hn_0652746727645.pdf"
            },
            {
              "side": "BACK",
              "uri": "/AbAcQ4hn_0652746727646.pdf"
            }
          ]
        }
      ],
      "address_documents": [
        {
          "type": "BANK_STATEMENT",
          "files": [
            {
              "uri": "/AbAcQ4hn_0652746727638.pdf"
            }
          ]
        }
      ],
      "supporting_documents": []
    },
    {
      "associated_party_id": "f71dc19f-b9a0-49fb-bd2d-5add3c01626e",
      "identifying_documents": [
        {
          "type": "NATIONAL_ID",
          "number": "NID-987654",
          "country": "USA",
          "issue_date": "2021-03-10",
          "expiry_date": "2031-03-10",
          "files": [
            {
              "side": "FRONT",
              "uri": "/XyZ123mn_0652746727650.pdf"
            },
            {
              "side": "BACK",
              "uri": "/XyZ123mn_0652746727651.pdf"
            }
          ]
        }
      ],
      "address_documents": [
        {
          "type": "UTILITY_BILL",
          "files": [
            {
              "uri": "/XyZ123mn_0652746727652.pdf"
            }
          ]
        }
      ]
    }
  ]
}
'