[
 {
  "member": {
   ".tag": "email",
   "email": "h5bk6ft62s@privaterelay.appleid.com"
  },
  "result": {
   ".tag": "success",
   "success": {
    ".tag": "editor"
   }
  },
  "sckey_sha1": "ee2d8fd2cee052e103a52aa74be85bbebb8e6bb4",
  "invitation_signature": [
   "ee2d8fd2cee052e103a52aa74be85bbebb8e6bb4:ed7721b375882c806612d4056dad9f317cc98a22"
  ]
 }
]