Update Custom Attributes of a Customer

curl -X PUT "https://api.chartmogul.com/v1/customers/cus_de305d54-75b4-431b-adb2-eb6b9e546012/attributes/custom" \
     -u YOUR_API_KEY: \
     -H "Content-Type: application/json" \
     -d '{
          "custom":{
            "pro": true,
            "channel": "Twitter"
          }
         }'

customer = ChartMogul::Customer.retrieve('cus_de305d54-75b4-431b-adb2-eb6b9e546012')
customer.update_custom_attributes!(
  pro: true, 
  channel: "Twitter"
)

ChartMogul.CustomAttribute.update(config, "cus_de305d54-75b4-431b-adb2-eb6b9e546012", {
   "custom": {
    "pro": true,
    "channel": "Twitter"
   }
}, function (err, res) {
   // asynchronously called
});

<?php

$customer = ChartMogul\Customer::retrieve(
                "cus_de305d54-75b4-431b-adb2-eb6b9e546012");
$customer->updateCustomAttributes(
        ["channel" => "Twitter"],
        ["pro" => true]
);
?>

api.UpdateCustomAttributesOfCustomer(
        "cus_c0dc8d74-edfd-11e6-a357-832dddba822f",
        map[string]interface{}{
            "channel": "Twitter",
        })

chartmogul.CustomAttributes.update(
    config,
    uuid="cus_c0dc8d74-edfd-11e6-a357-832dddba822f",
    data={"custom": {
            "channel": "Twitter"
        }
    }
)

{
  "custom": {
    "CAC": 213,
    "utmCampaign": "social media 1",
    "convertedAt": "2015-09-08 00:00:00",
    "pro": true,
    "channel": "Twitter"
  }
}

{
  :CAC=> 213,
  :utmCampaign=> "social media 1",
  :convertedAt=> "2015-09-08 00:00:00",
  :pro=> true,
  :salesRep=> "Gabi",
  :channel=> "Twitter",
  :age=> 8
}

{
  "custom": {
    "CAC": 213,
    "utmCampaign": "social media 1",
    "convertedAt": "2015-09-08 00:00:00",
    "pro": true,
    "channel": "Twitter"
  }
}

<?php

array (
  "CAC" => 213,
  "utmCampaign" => "social media 1",
  "convertedAt" => "2015-09-08 00:00:00",
  "pro" => true,
  "channel" => "Twitter"
)
?>

(*chartmogul.CustomAttributes)(0xc04206e030)({
 Custom: (map[string]interface {}) (len=2) {
  (string) (len=3) "CAC": (float64) 8,
  (string) (len=7) "channel": (string) (len=7) "Twitter"
 }
})

<CustomAttributes{
    custom={
        'CAC': 8, 
        'channel': 'Twitter'}}>