Zewnetrzne API, przetwarzanie w node red i home assistant

Witam, mam problem jak odczytać dane z zewnętrznego API. Chce je wykorzystać do stworzenia sensora w home assistant, przesłać przez mqtt out w node-red, interesują mnie informacje z measurement.

w configuration.yaml dodałem

sensor:
  - platform: mqtt
    state_topic: '/homeassistant/septic_tank'
    name: septic_tank

w Node-RED API w debug daje takie info.

{
    "id":"xxxxxx",
    "login":"xxxxxx",
    "firstname":"xxxx",
    "lastname":"xxxxx",
    "email":"xxxxxxx",
    "active":true,
    "created":"2019-12-29 11:36:17",
    "address":{
        "address":"xxxxx",
        "town":"xxxxx",
        "postalcode":"xxxx",
        "country":"Polska"
        },
    "locations":[
        {
        "id":"xxxxxx",
        "name":"xxxxxx",
        "created":"2019-12-29 11:36:17",
        "max":130,
        "alarm":125,
        "adc1":5618,
        "adc2":21412,
        "cm1":1,
        "cm2":102,
        "active":false,
        "tanktype":1,
        "mainboard":"SZ0204",
        "software":"9.0",
        "direction":"growth",
        "address":{
            "address":"xxxxx",
            "town":"xxxxx",
            "postalcode":"xxxxx",
            "country":"Polska"
            },
        "measurement":{
            "percent":78,
            "cm":97,
            "temperature":10.6,
            "volts":5.3,
            "rssi":73,
            "nextfull":"2020-11-28 08:40:22",
            "lastempty":"2020-10-12 09:02:34",
            "datatime":"2020-11-18 12:42:39"
            }
        }
    ]
}