zcrmsdk\crm\crud\ZCRMRecord returned object get data

Question

Using this awesome package, I'm having trouble on how to get the actual value from the returned data from ZohoCRM. Here's an example:

Using dd():

zcrmsdk\crm\crud\ZCRMRecord {#1 ▼
  -entityId: "111"
  -moduleApiName: "Leads"
  -lineItems: []
  -lookupLabel: null
}

Using var_dump():

object(zcrmsdk\crm\crud\ZCRMRecord)#111 (4) {
  ["entityId":"zcrmsdk\crm\crud\ZCRMRecord":private]=>
  string(3) "111"
  ["moduleApiName":"zcrmsdk\crm\crud\ZCRMRecord":private]=>
  string(5) "Leads"
  ["lineItems":"zcrmsdk\crm\crud\ZCRMRecord":private]=>
  array(0) {
  }
  ["lookupLabel":"zcrmsdk\crm\crud\ZCRMRecord":private]=>
  NULL
}

Here's the code in getting the data:

$records = ZohoManager::useModule('Leads')->searchRecordsByWord('word to be searched');

$first_record = $records[0];

I would like to know how to get the specific value like entityId? Thank you.