Trying to write a custom attribute to a participant mid-call using GetRESTProxy in . The PUT /api/v2/conversations/voice/participants/{id} call returns 400 Bad Request with INVALID_ARGUMENT. The payload looks right:
{
"attributes": {
"custom": {
"priority": "high"
}
}
}
The participant ID is valid. Is there a specific format for the nested attributes object that the REST Proxy requires?