Assign legal hold policy

curl -X POST https://api.box.com/2.0/legal_hold_policy_assignments \
     -H 'Authorization: Bearer <ACCESS_TOKEN>'
     -H 'Content-Type: application/json" '
     -d '{
       "policy_id": "123244",
       "assign_to": {
         "type": "folder",
         "id": "6564564"
       }
     }'

var requestParams = new BoxLegalHoldPolicyAssignmentRequest()
{
    PolicyId = "11111",
    AssignTo = new BoxRequestEntity()
    {
        Type = "folder",
        Id = "12345"
    }
};
BoxLegalHoldPolicyAssignment assignment = await client.LegalHoldPoliciesManager
    .CreateAssignmentAsync(requestParams);

BoxLegalHoldPolicy policy = new BoxLegalHoldPolicy(api, policyID);
BoxFolder folder = new BoxFolder(api, folderID);
policy.assignTo(folder);

folder_to_assign = client.folder(folder_id='22222')
assignment = client.legal_hold_policy(policy_id'12345').assign(folder_to_assign)
print('Applied policy "{0}" to {1} {2}'.format(
    assignment.legal_hold_policy.policy_name,
    assignment.assigned_to.type,
    assignment.assigned_to.id,
))

client.legalHoldPolicies.assign('11111', 'folder', '12345')
	.then(assignment => {
		/* assignment -> {
			type: 'legal_hold_policy_assignment',
			id: '22222',
			legal_hold_policy: 
			{ type: 'legal_hold_policy',
				id: '11111',
				policy_name: 'IRS Audit' },
			assigned_to: { type: 'folder', id: '12345' },
			assigned_by: 
			{ type: 'user',
				id: '33333',
				name: 'Example User',
				login: 'user@example.com' },
			assigned_at: '2016-05-18T17:38:03-07:00',
			deleted_at: null }
		*/
	});

client.legalHolds.forceApply(policyId: "1234", assignToId: "4568" ,assignToType: "file") { (result: Result<LegalHoldPolicyAssignment, BoxSDKError>) in
    guard case let .success(assignment) = result else {
        print("Error assigning legal hold policy")
        return
    }
    print("Assigned a legal hold policy at \"\(assignment.assignedAt)\"")
}