CustomerWriteRequest

Customer create payload. All fields optional. Validation:

name — string, 1–255 chars.

email — string, valid email, ≤ 255 chars.

mobile — string, ≤ 20 chars, must start with +, E.164 format.

externalId — string, letters/digits/dash/underscore, ≤ 255 chars, unique per company.

metadata — JSON object.

{
    "externalId": "crm-7741",
    "name": "Layla Hassan",
    "email": "layla.hassan@example.com",
    "mobile": "+97333445566",
    "metadata": {
        "tier": "gold",
        "source": "mobile-app"
    }
}