REST Web API post related entities - asp.net-web-api

Question

Hi CodeFluent enthusiasts!
I have these two related entities in my model:
<cf:entity name="Main" defaultUsePersistenceDefaultValue="false" namespace="idscommerce" categoryPath="/idscommerce">
<cf:property name="Id" key="true" />
<cf:property name="Nom" />
<cf:property name="Ordre" />
<cf:property name="URL" />
<cf:property name="Icona" />
<cf:property name="Texts" typeName="{0}.MainTextCollection" relationPropertyName="Main" dataMember="true" />
<cf:entity name="MainText" defaultUsePersistenceDefaultValue="false" namespace="idscommerce" categoryPath="/idscommerce">
<cf:property name="Id" key="true" />
<cf:property name="Text" />
<cf:property name="Idioma" typeName="{0}.Idioma" relationPropertyName="MainTexts" />
<cf:property name="Main" typeName="{0}.Main" relationPropertyName="Texts" />
In my API, GET is working right, but when I POST (I'm using the [FromBody]Main value option) it goes into a loop at LoadByMain method from MainTextCollection.
// GET api/Main/id
public Main Get(string id)
{
idscommerce.Main value = idscommerce.Main.LoadByEntityKey(id);
if(value == null)
{
throw new HttpResponseException(HttpStatusCode.NotFound);
}
return value;
}
// POST api/Main
public HttpResponseMessage Post([FromBody]Main value)
{
if(value == null || !value.Save())
{
return Request.CreateResponse(HttpStatusCode.BadRequest);
}
return Request.CreateResponse(HttpStatusCode.OK, value);
}
What it's weird is that the same class works as expected when calling from Main.LoadAll() or Main.LoadById(id), but it's going into an endless loop when called from the API POST method using Post([FromBody]Main value).