curl --request POST \
  --url https://sandbox.layerfi.com/v1/businesses/{businessId}/bills/bill-payments/{paymentId}/update \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "external_id": "<string>",
  "at": "2023-11-07T05:31:56Z",
  "amount": 123,
  "method": "CASH",
  "processor": "<string>",
  "payment_clearing_account_identifier": {
    "type": "AccountId",
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
  },
  "bill_payment_allocations": [
    {
      "bill_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "bill_external_id": "<string>",
      "amount": 123,
      "tags": [
        {
          "key": "Location",
          "value": "MainStreet"
        }
      ],
      "memo": "<string>",
      "metadata": {
        "custom_field": "value",
        "any valid json": "below 10kb",
        "nested": {
          "meaning of life": 42,
          "array": []
        }
      },
      "reference_number": "<string>"
    }
  ],
  "tags": [
    {
      "key": "Location",
      "value": "MainStreet"
    }
  ],
  "memo": "<string>",
  "metadata": {
    "custom_field": "value",
    "any valid json": "below 10kb",
    "nested": {
      "meaning of life": 42,
      "array": []
    }
  },
  "reference_number": "<string>"
}'

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "external_id": "<string>",
  "at": "2023-11-07T05:31:56Z",
  "method": "CASH",
  "amount": 123,
  "processor": "<string>",
  "payment_clearing_account": {
    "id": {
      "type": "AccountId",
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
    },
    "name": "Current Assets",
    "stable_name": {
      "type": "StableName",
      "stable_name": "CURRENT_ASSETS"
    },
    "normality": "CREDIT",
    "account_type": {
      "value": "ASSET",
      "display_name": "Asset"
    },
    "account_subtype": {
      "value": "BANK_ACCOUNTS",
      "display_name": "Current Assets"
    }
  },
  "imported_at": "2023-11-07T05:31:56Z",
  "allocations": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "bill_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "payment_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "amount": 123,
      "transaction_tags": [
        {
          "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
          "key": "ExampleTagKey",
          "value": "ExampleTagValue",
          "created_at": "2023-11-07T05:31:56Z",
          "updated_at": "2023-11-07T05:31:56Z",
          "deleted_at": "2023-11-07T05:31:56Z"
        }
      ],
      "memo": "<string>",
      "metadata": {
        "custom_field": "value",
        "any valid json": "below 10kb",
        "nested": {
          "meaning of life": 42,
          "array": []
        }
      },
      "reference_number": "<string>"
    }
  ],
  "transaction_tags": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "key": "ExampleTagKey",
      "value": "ExampleTagValue",
      "created_at": "2023-11-07T05:31:56Z",
      "updated_at": "2023-11-07T05:31:56Z",
      "deleted_at": "2023-11-07T05:31:56Z"
    }
  ],
  "memo": "<string>",
  "metadata": {
    "custom_field": "value",
    "any valid json": "below 10kb",
    "nested": {
      "meaning of life": 42,
      "array": []
    }
  },
  "reference_number": "<string>"
}