{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "54388",
    "entityType": "User",
    "nonce": "0xb45251cba1d7f8e2fad61cff6f456f3360060c3fde96a078b68731a6b83dba3c",
    "signature": "0xeb966a19fea2c4a151ebda776646ea24721b105856dee132a39d5565e41bf24408eabf567d5bca883f817f0b2139ffa174d1c104e92ea24c5bc17d03fafefcd61c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}