This webhook is triggered when a user searches for a recipient. If the registered endpoint answers with a list of contacts, they will be shown in the UI and automatically imported into Proposales when added as a proposal recipient. It will send a POST request with search in the path, containing the URL encoded search terms, and IntegrationSessionData as the body. The response needs to be in this shape: 
{
  data: {
    uniqueId: string;
    email: string;
    firstName?: string;
    lastName?: string;
    isBusiness?: boolean;
    phone?: string;
    companyName?: string;
    metadata?: Record<string, unknown>;
  }[]
}
It’s important that uniqueId is a unique identifier for the contact.