YouTube Api : snippet.live_chat_id is required - php

Question

I have been struggling with the youtube alot.
The problem is, i have made my own php curl script which should connect to the youtube api and send a livechat message to my current stream.
I am so close to finishing this issue but only this 1 last part stops me.
The script i currently use is:
$data = array("snippet" => ["type" => 'textMessageEvent', 'textMessageDetails' => ['messageText' => '<3']], 'livechatid' => '{{livechatid_here}}');
$data_string = json_encode($data);
$ch = curl_init('https://www.googleapis.com/youtube/v3/liveChat/messages?part=snippet&fields=authorDetails%2Ckind%2Csnippet&key={{Here is my key}}');
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
'Content-Type: application/json',
'Content-Length: ' . strlen($data_string),
'Authorization: Bearer {{access_key}} ')
);
$result = curl_exec($ch);
dd($result);
But im constantly getting the following error:
"code": 400,
"message": "snippet.live_chat_id is required"\n
So what i did was i changed 'livechatid' to:
liveChatId (as API tells me)
live_Chat_Id
livechatid
snippet.livechatid
snippet.liveChatId
snippet.live_chat_id
And none of them worked.
Does anybody know how i can fix this?
Ofcourse i have been deleting my keys and access_tokens from the code above.
I have also tried adding them to the header but i still get the same error again and again.
Does anybody know how i can solve this problem?

Answer 1

Put liveChatId inside the snippet field :
$data = array("snippet" => [
"type" => 'textMessageEvent',
'textMessageDetails' => ['messageText' => '<3'],
'liveChatId' => 'YOUR_LIVE_CHAT_ID'
]);
$data_string = json_encode($data);