CUSIP No. 67401P 108 13D Page 15 of 16 Pages

Exhibit 1

AMENDED AND RESTATED JOINT FILING AGREEMENT

Pursuant to Rule 13d-1(k)(1) promulgated under the Securities Exchange Act of 1934, as amended, each of the undersigned acknowledges and agrees that the foregoing statement on Schedule 13D is filed on behalf of the undersigned and that all subsequent amendments to this statement on Schedule 13D shall be filed on behalf of the undersigned without the necessity of filing additional joint acquisition statements. Each of the undersigned acknowledges that it shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning it contained therein, but shall not be responsible for the completeness and accuracy of the information concerning the others, except to the extent that it knows or has reason to believe that such information is inaccurate.

Dated as of May 14, 2019.

OAKTREE CAPITAL MANAGEMENT, L.P.
By:	/s/ Philip McDermott
	Name: Philip McDermott
	Title: Senior Vice President
OAKTREE HOLDINGS, INC.
By:	/s/ Philip McDermott
	Name: Philip McDermott
	Title: Senior Vice President
OAKTREE CAPITAL GROUP, LLC
By:	Oaktree Capital Group Holdings GP, LLC
Its:	Manager
By:	/s/ Philip McDermott
	Name: Philip McDermott
	Title: Senior Vice President
OAKTREE CAPITAL GROUP HOLDINGS GP, LLC
By:	/s/ Philip McDermott
	Name: Philip McDermott
	Title: Senior Vice President
OAKTREE CAPITAL I, L.P.
By:	/s/ Philip McDermott
	Name: Philip McDermott
	Title: Senior Vice President
OCM HOLDINGS I, LLC
By:	/s/ Philip McDermott
	Name: Philip McDermott
	Title: Senior Vice President

CUSIP No. 67401P 108 13D Page 16 of 16 Pages

OAKTREE HOLDINGS, LLC
By:	/s/ Philip McDermott
	Name: Philip McDermott
	Title: Senior Vice President