Melilla height - EPSG:10354

WKT

VERTCS["Melilla_height", 
	VDATUM["Melilla"], 
	PARAMETER["Vertical_Shift", 0.0], 
	PARAMETER["Direction", 1.0], 
	UNIT["Meter", 1.0]]

WKT2

VERTCRS["Melilla_height", 
	VDATUM["Melilla"], 
	CS[vertical, 1], 
	AXIS["Gravity-related height (H)", up, 
		LENGTHUNIT["Meter", 1.0]], 
	ID["EPSG", "10354"]]

Data from @esri/proj-codes

{
  "wkid": 10354,
  "latestWkid": 10354,
  "macro": "PE_VCS_MELILLA_HEIGHT",
  "name": "Melilla_height",
  "wkt": "VERTCS[\"Melilla_height\",VDATUM[\"Melilla\"],PARAMETER[\"Vertical_Shift\",0.0],PARAMETER[\"Direction\",1.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "VERTCRS[\"Melilla_height\",VDATUM[\"Melilla\"],CS[vertical,1],AXIS[\"Gravity-related height (H)\",up,LENGTHUNIT[\"Meter\",1.0]],ID[\"EPSG\",\"10354\"]]",
  "description": "Melilla height",
  "authority": "EPSG",
  "version": "10.091(13.2.0)",
  "deprecated": "no",
  "areaname": "Spain - Melilla",
  "extent": {
    "slat": 35.26,
    "nlat": 35.38,
    "llon": -2.98,
    "rlon": -2.88
  }
}