Forwarding messages to a new or existing chat

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,"https://insprl.com/api/whatsapp/msg/forward-msg");
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_HTTPHEADER, array( 'Authorization: {CLIENT_KEY}'
));
curl_setopt($ch, CURLOPT_POSTFIELDS, 
http_build_query(
array(
   'client_id'	=> '{CLIENT_ID}',
   'instance_id' => '{SPRL_INSTANCE_ID}',
   'countrycode' => '91',
   'mobile' => '9000000000',
   'msgid' => 'SKFIEK239D,ASD23230DL,ASRFTG39D'
)
));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);
curl_close ($ch);

{
"code": 100,
"message": "success",
"data": {
   "campaign_id": "2302383923",
   "msgid": "SKFIEK239D",
   "status": "sent",
   "msg": "ok"
}
}