contract/contract_digitized_signature/views/contract_views.xml

<?xml version="1.0" ?>
<odoo>

    <record id="contract_contract_signature_form_view" model="ir.ui.view">
        <field name="name">contract.contract form view.signature</field>
        <field name="model">contract.contract</field>
        <field name="inherit_id" ref="contract.contract_contract_form_view"/>
        <field name="arch" type="xml">
            <field name="partner_id" position="after">
                <field name="user_id"/>
                <field name="signature_name"/>
            </field>
            <xpath expr="//group[@name='group_legend']" position="after">
                <div class="oe_clear"/>
                <label for="customer_signature" class="oe_edit_only"/>
                <field name="customer_signature" widget="signature"/>
            </xpath>
        </field>
    </record>

</odoo>