immoscout-contactPerson.js

const axios = require('axios')
const url = 'https://www.immobilienscout24.de/expose/98935021?referrer=RESULT_LIST_LISTING&navigationServiceUrl=%2FSuche%2Fcontroller%2FexposeNavigation%2Fnavigate.go%3FsearchUrl%3D%2FSuche%2FS-T%2FHaus-Kauf%2FHamburg%2FHamburg%2FWinterhude%26exposeId%3D98935021&navigationHasNext=true&navigationBarType=RESULT_LIST&searchId=728d7848-a86b-3931-a46d-1654428323ad#/'

/*====================================================*/

const parseContactName = html => {
    const result = JSON.parse(
        html.substring(
            html.search('contactData:') + 13,
            html.search('contactButton') - 2
        ) + '}'
    )
    console.log(result)     
}

/*====================================================*/

axios.get(url)
    .then(response => parseContactName(response.data))
    .catch(error => console.error(error))

/*==================== Result: ========================*/

{
    "phoneNumbers": {
        "phoneNumber": {
            "contactNumber": "040 473329"
        },
        "cellPhoneNumber": {
            "contactNumber": "0172 4073329"
        },
        "faxNumber": {
            "contactNumber": "040 46779864"
        }
    },
    "contactPerson": {
        "salutationAndTitle": "Frau",
        "firstName": "Inga",
        "lastName": "Krüll"
    }
}