Oracle Integration Cloud Service (ICS) is a platform provided by Oracle that enables you to connect and integrate various cloud and on-premises applications. To integrate Docusign with ICS, you can follow these steps:

1. Docusign API: Docusign provides a RESTful API that allows you to interact with its services programmatically. You will need to review the Docusign API documentation to understand the available endpoints and authentication mechanisms.

2. Obtain Docusign API Credentials: To access the Docusign API, you will need to sign up for a Docusign developer account, create an integration, and obtain API credentials (such as API key or OAuth tokens).

3. Create an Integration in ICS: In Oracle Integration Cloud Service, you can create an integration that connects to the Docusign API. You can use the REST adapter in ICS to send and receive data to and from Docusign.

4. Configure Connectivity: In the integration, you will need to configure the REST adapter with the Docusign API endpoint and authentication credentials.

5. Design Integration Flows: Based on your use case, design the integration flows to perform actions in Docusign, such as sending documents for signature, retrieving status updates, etc.

6. Testing: Test your integration thoroughly to ensure that data is flowing correctly between Docusign and Oracle ICS.

7. Monitor and Maintain: Once the integration is in production, monitor its performance, and be prepared to handle any potential issues or changes in the Docusign API.