patch pubisher bid modifier error 404

Hey, I am trying to patch publisher bid modifier trough backstage api but i get an error 404 with message "account"

Could you provide any information what could cause this kind of error?

request body:

{
"patch_operation": "ADD",
"publisher_targeting": null,
"publisher_bid_modifier": {
"values": [
{
"target": "123456",
"cpc_modification": 1.1
}
]
},
"publisher_bid_strategy_modifiers": null
}

response body

{
"http_status": 404,
"message": "account"
}

Elvar