AuthenticationFailedInvalidHeader when using the Azure API Management REST API

I'm willing to log stuff from my Azure Api Management into an eventhub using policies.

I'm following this documentation : https://learn.microsoft.com/en-us/rest/api/apimanagement/logger/createorupdate

Here is my HTTP Request (using Postman):

PUT /subscriptions/3f0a0802-0a42-4a73-82b2-094d41acd70a/resourceGroups/GRP-Poc-BilanHydrique/providers/Microsoft.ApiManagement/service/WaterBalance/loggers/end-user-logger?api-version=2017-03-01 HTTP/1.1 Host: management.azure.com Authorization: {my token} Content-Type: application/json Cache-Control: no-cache Postman-Token: 449f686d-3a86-b714-0b37-979567f6f921 { "properties": { "loggerType": "azureEventHub", "description": "adding a new logger", "credentials": { "name": "api-management-logs", "connectionString": "{my connection string}" } } } 

I generated my token from the Api Manager UI at this URL : /admin/tenant/access I've checked the expiration.

It look like this :

SharedAccessSignature integration&{date}&{base64stuff}== 

Here is a screenshot of where I created that token : screenshot

And here you have the response :

{ "error": { "code": "AuthenticationFailedInvalidHeader", "message": "Échec de l'authentification. L'en-tête 'Authorization' est fourni dans un format incorrect." } 

I can't figure out what's going on. Any ideas ? Is there a workaround ? Is there any way to create the api management logger through the azure portal ?

Thanks !

UPDATE 01/30 :

Thanks to your answers, I figured out it was not the right API. I've tried the API Management endpoint, and I get a 500 HTTP error :

Request :

PUT /loggers/end-user-logger?api-version=2018-01-01 HTTP/1.1 Host: waterbalance.management.azure-api.net Authorization: SharedAccessSignature integration&201801301710&{secret}== Content-Type: application/json Cache-Control: no-cache Postman-Token: 2618737b-af3e-c7d3-1d31-6b6f654100e9 { "properties": { "loggerType": "AzureEventHub", "description": "adding a new logger", "credentials": { "name": "end-user-logs", "connectionString": "Endpoint=sb://api-management-logs.servicebus.windows.net/;SharedAccessKeyName=Sending;SharedAccessKey={secret}" } } } 

Response:

 { "error": { "code": "InternalServerError", "message": "Request processing failed due to internal error.", "details": null } 

It doesn't seem to be a token issue since i don't get a Unauthorized error.