VariableSource

contact (un dato del contacto), attribute (un campo personalizado) o static (un valor fijo).

sourcestringrequired

Possible values: [contact, attribute, static]

keystring

Example: first_name

fallbackstring

Possible values: non-empty and <= 200 characters

valuestring

Possible values: non-empty and <= 1000 characters

VariableSource

{
  "source": "contact",
  "key": "first_name",
  "fallback": "string",
  "value": "string"
}