NAD 1983 (MA11) - ESRI:104286

WKT

GEOGCS["GCS_NAD_1983_MA11", 
	DATUM["D_NAD_1983_MA11", 
		SPHEROID["GRS_1980", 6378137.0, 298.257222101]], 
	PRIMEM["Greenwich", 0.0], 
	UNIT["Degree", 0.0174532925199433]]

WKT2

GEOGCRS["GCS_NAD_1983_MA11", 
	DYNAMIC[
		FRAMEEPOCH[2012.4467], 
		MODEL["HTDP"]], 
	DATUM["D_NAD_1983_MA11", 
		ELLIPSOID["GRS_1980", 6378137.0, 298.257222101]], 
	PRIMEM["Greenwich", 0.0], 
	CS[ellipsoidal, 2], 
	AXIS["Latitude (lat)", north, 
		ORDER[1]], 
	AXIS["Longitude (lon)", east, 
		ORDER[2]], 
	ANGLEUNIT["Degree", 0.0174532925199433], 
	ID["Esri", "6325"]]

Data from @esri/proj-codes

{
  "wkid": 104286,
  "latestWkid": 6325,
  "macro": "PE_GCS_NAD_1983_MA11",
  "name": "GCS_NAD_1983_MA11",
  "wkt": "GEOGCS[\"GCS_NAD_1983_MA11\",DATUM[\"D_NAD_1983_MA11\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]]",
  "wkt2": "GEOGCRS[\"GCS_NAD_1983_MA11\",DYNAMIC[FRAMEEPOCH[2012.4467],MODEL[\"HTDP\"]],DATUM[\"D_NAD_1983_MA11\",ELLIPSOID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],CS[ellipsoidal,2],AXIS[\"Latitude (lat)\",north,ORDER[1]],AXIS[\"Longitude (lon)\",east,ORDER[2]],ANGLEUNIT[\"Degree\",0.0174532925199433],ID[\"Esri\",\"6325\"]]",
  "description": "NAD 1983 (MA11)",
  "authority": "Esri",
  "version": "10.1.0",
  "deprecated": "codechange",
  "areaname": "Pacific - US interests Mariana plate",
  "extent": {
    "slat": 1.64,
    "nlat": 23.9,
    "llon": 129.48,
    "rlon": 149.55
  },
  "frameEpoch": 2012.4467,
  "deformationModel": "HTDP"
}