json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "properties": {
          "account_identifier": {
              "description": "The identifier for the platform account to fund.",
              "maxLength": 96,
              "minLength": 5,
              "pattern": "^[\\+\\w-]{5,96}$",
              "type": "string"
          },
          "client_ip": {
              "description": "The IP address of the person making the purchase.",
              "type": "string"
          },
          "credit_card": {
              "description": "Details of the credit card being used to fund the account.",
              "properties": {
                  "billing_address": {
                      "description": "The billing address associated with the credit card.",
                      "properties": {
                          "address": {
                              "description": "The billing address. For multi-line addresses append subsequent lines to the first.",
                              "maxLength": 60,
                              "minLength": 1,
                              "type": "string"
                          },
                          "city": {
                              "description": "The city of the customer's billing address.",
                              "maxLength": 40,
                              "minLength": 1,
                              "type": "string"
                          },
                          "country": {
                              "description": "The country of the customer's billing address.",
                              "maxLength": 60,
                              "minLength": 1,
                              "optional": true,
                              "type": "string"
                          },
                          "email": {
                              "description": "The customer's email address.",
                              "maxLength": 255,
                              "minLength": 5,
                              "pattern": "^\\S+@\\S+$",
                              "type": "string"
                          },
                          "f_name": {
                              "description": "The first name associated with the customer's billing address.",
                              "maxLength": 50,
                              "minLength": 1,
                              "type": "string"
                          },
                          "l_name": {
                              "description": "The last name associated with the customer's billing address.",
                              "maxLength": 50,
                              "minLength": 1,
                              "type": "string"
                          },
                          "state": {
                              "description": "The state of the customer's billing address. Up to 40 characters (no symbols) or a FIPS state alpha code (e.g. AL, WA, etc).",
                              "maxLength": 40,
                              "minLength": 1,
                              "type": "string"
                          },
                          "zip": {
                              "description": "The postal code of the customer's billing address.",
                              "maxLength": 20,
                              "minLength": 1,
                              "type": "string"
                          }
                      },
                      "required": [
                          "f_name",
                          "l_name",
                          "address",
                          "city",
                          "state",
                          "zip",
                          "email"
                      ],
                      "type": "object"
                  },
                  "expiration": {
                      "description": "The expiration date of the credit card in YYYY-MM format.",
                      "pattern": "^[0-9]{4}-(?:0[1-9]|1[0-2])$",
                      "type": "string"
                  },
                  "number": {
                      "description": "The credit card number, preferably numbers only.",
                      "maxLength": 20,
                      "minLength": 10,
                      "type": "string"
                  },
                  "security_code": {
                      "description": "The 3 or 4-digit card security code (CVV2, CVC2, or CID).",
                      "pattern": "^\\d{3,4}$",
                      "type": "string"
                  }
              },
              "required": [
                  "number",
                  "expiration",
                  "security_code",
                  "billing_address"
              ],
              "type": "object"
          },
          "customer": {
              "description": "The platform's customer.",
              "maxLength": 96,
              "minLength": 1,
              "type": "string"
          }
      },
      "required": [
          "customer",
          "account_identifier",
          "client_ip",
          "credit_card"
      ],
      "title": "Register a card to a platform user's account.",
      "type": "object"
  }