AWS Gamelift REST API request\response issue

[NikolayKhramov1]

Hello! I have faced issue with AWS Gamelift API request\response.
The problem is that on the PS5 platform, I get a response 400 without any message.
On Windows in Unreal Engine editor this request works properly and get 200 response.
I was following the documentation for REST API communication(https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_sigv.html) because PS5 is not supported in aws cpp sdk.

Here is what I generate for singing a request:
CanonicalString:
POST
/

content-type:application/x-amz-json-1.1
host:gamelift.eu-central-1.amazonaws.com
x-amz-date:20250520T094054Z
x-amz-target:GameLift.DescribeGameSessionQueues

content-type;host;x-amz-date;x-amz-target
5dcfb2a7d92cb638dd1277905f6b4f665e048f60d6a22d7e7027790e3cf528a8

StringToSign:
AWS4-HMAC-SHA256
20250520T094054Z
20250520/eu-central-1/gamelift/aws4_request
f73adef39cd9458c0a297d2d229579073758ccc6e70f5b11364a603ddc712f46

Here is what I send in the request:
Request URL: https://gamelift.eu-central-1.amazonaws.com
Request Headers:
X-Amz-Date: 20250520T094054Z
X-Amz-Target: GameLift.DescribeGameSessionQueues
Content-Type: application/x-amz-json-1.1
Host: gamelift.eu-central-1.amazonaws.com
Authorization: AWS4-HMAC-SHA256 Credential=AKIAVAW6XXXXXXXXXX/20250520/eu-central-1/gamelift/aws4_request, SignedHeaders=content-type;host;x-amz-date;x-amz-target, Signature=04f2cf568934ba1c192878460cb265ed6d4ee7830a4913ac74ec7f5d6a429633

Request Body: {"Names":["MyFleetQueue"]}

[NikolayKhramov1]

Issue created here: #3430

[github-actions[bot]]

Hello! Reopening this discussion to make it searchable.