<aura:component>
    <lightning:recordEditForm recordId="003XXXXXXXXXXXXXXX" objectApiName="Contact">
        <lightning:messages />
        <lightning:inputField fieldName="FirstName" />
        <lightning:inputField fieldName="LastName" />
        <lightning:inputField fieldName="Email" />
        <lightning:button class="slds-m-top_small" variant="brand" type="submit" name="update" label="Update" />
    </lightning:recordEditForm>
</aura:component>