{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1640466",
    "entityType": "User",
    "nonce": "0x399d8179400891bde05c7a32a46cdf85666b2a0977d935543a387ceddb224e44",
    "signature": "0x95d25090355413b64dfc66e4d9eb7444d9e46c89274e3bb851a8fd178c5b6db710fea6138555a45d427e70dd06ffab227a4b26dbc00cb95de05edef6f4a6ea9c1b",
    "signer": "0xa57593F3a1A5195a04478EbE63b027bE3f1466C5",
    "userId": "1683"
  }
}