Body is not deserialize from powershell call - powershell

Question

I have an error with powershell api call.
This is my powershell code :
$body='[{"Criteres":[{"Nom":"Code","Valeur":"lyon"},{"Nom":"Libellé","Valeur":"lyon test"}],"Nom":"X_Site_Geogr","Pseudo":"Site Géographique"}]'
$url="http://localhost/api/OccObjets/"
$Responseappli = Invoke-WebRequest -URI $url -Method "PUT" -Body $body -ContentType "text/json" -UseDefaultCredentials
Write-Output $Responseappli.Content
This is controller method :
[HttpPut]
public IHttpActionResult Put([FromBody] IEnumerable<TOObjetAvecCriteres> listeOccurrence)
If i use the same body on Postman or swagger, it works perfectly but with powershell, my list is null.
I add a handler to get raw body with that :
var bodyStream = new StreamReader(HttpContext.Current.Request.InputStream);
bodyStream.BaseStream.Seek(0, SeekOrigin.Begin);
var bodyText = bodyStream.ReadToEnd();
var test = JsonConvert.DeserializeObject<IEnumerable<TOObjetAvecCriteres>>(bodyText);
body powershell :
"[{\"Criteres\":[{\"Nom\":\"Code\",\"Valeur\":\"lyon\"},{\"Nom\":\"Libell�\",\"Valeur\":\"lyon test\"}],\"Nom\":\"X_Site_Geogr\",\"Pseudo\":\"Site G�ographique\"}]"
body swagger :
"[{\"Criteres\":[{\"Nom\": \"Code\",\"Valeur\": \"lyon\"},{\"Nom\": \"Libellé\",\"Valeur\": \"lyon test\"}],\"Nom\": \"X_Site_Geogr\",\"Pseudo\": \"Site Géographique\"}]"
Deserialization in handler works whith both powershell and swagger but in my controller function, listeOccurrence variable is null with powershell.
I aslo try to write body like this an convert to json but it doesn't work :
$body=#(
#{
"Nom"="X_Site_Geogr"
"Pseudo"="Site Géographique"
"Criteres"= #(
#{
"Nom"="Code"
"Valeur"="lyon"
}
#{
"Nom"="Libellé"
"Valeur"="lyon test2"
}
)
}
)
Do you have any idea ?
Thanks for your help