curl -X POST 'https://crypto-api.yativo.com/api/v1/yativo-card/customers/yativo_card_customer_8f9a..._1769031332068/source-of-funds' \
  -H 'Authorization: Bearer YOUR_ACCESS_TOKEN' \
  -H 'Content-Type: application/json' \
  -d '{
    "answers": [
      {"question": "EMPLOYMENT_STATUS", "answer": "EMPLOYED"},
      {"question": "SOURCE_OF_INCOME", "answer": "SALARY"}
    ]
  }'

{
  "success": true,
  "message": "Source of Funds submitted successfully",
  "data": {
    "yativo_card_id": "yativo_card_customer_8f9a..._1769031332068",
    "status": "completed",
    "submitted_at": "2026-04-01T12:15:00.000Z",
    "next_step": "Verify phone number using POST /phone/request-verification"
  }
}