curl --request POST \
  --url https://api.sandbox.co.in/it/compliance/eri/tax-payers/{tax_payer_id}/prefill-json/otp \
  --header 'Authorization: <authorization>' \
  --header 'x-api-key: <x-api-key>' \
  --header 'x-auth-token: <x-auth-token>' \
  --header 'x-user-id: <x-user-id>'

{
  "code": 200,
  "data": {
    "emailTransactionId": "FOS000005399835",
    "httpStatus": "SUBMITTED",
    "messages": [
      {
        "code": "EF40010",
        "fieldName": null,
        "type": "REMARK",
        "desc": "OTP has been sent successfully."
      }
    ],
    "smsTransactionId": "FOS000005399834",
    "errors": [],
    "successFlag": true
  }
}