AWS Secrets Manager Canonical Request AWS Signature V4

Hello everyone, I'm struggling to create the Canonical Request of the GetSecretValue action from the AWS Secrets Manager Api. I tried to create by using the sample request provided in the documentation. Sample Request: `

POST / HTTP/1.1
Host: secretsmanager.region.domain
Accept-Encoding: identity
X-Amz-Target: secretsmanager.GetSecretValue
Content-Type: application/x-amz-json-1.1
User-Agent: <user-agent-string>
X-Amz-Date: <date>
Authorization: AWS4-HMAC-SHA256 Credential=<credentials>,SignedHeaders=<headers>, Signature=<signature>
Content-Length: <payload-size-bytes>

{
  "SecretId": "MyTestDatabaseSecret",
}

` Taking that example in consideration, I made a request using the postman to test if my credentials was right and its returning the value that i need.

And, finally i tried to create the canon request using all of that info. MINE

`POST
/GetSecretValue

accept-encoding:identity
content-type:application/x-amz-json-1.1
host:secretsmanager.sa-east-1.amazonaws.com
x-amz-content-sha256:beaead3198f7da1e70d03ab969765e0821b24fc913697e929e726aeaebf0eba3
x-amz-date:20230111T145646Z
x-amz-target:secretsmanager.getsecretvalue

accept-encoding;content-type;host;x-amz-content-sha256;x-amz-date;x-amz-target
beaead3198f7da1e70d03ab969765e0821b24fc913697e929e726aeaebf0eba3`

CANONICAL REQUEST Example `

GET
/test.txt

host:examplebucket.s3.amazonaws.com
range:bytes=0-9
x-amz-content-sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
x-amz-date:20130524T000000Z

host;range;x-amz-content-sha256;x-amz-date
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855  

` Can someone tell what i did wrong? or if the structure of the request is incorrect?