{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xe77ee94591adb39752bb3b7388e05950e25a1e70965df495862e5a5c8386fcca",
    "signature": "0x4a56620e77be2d0816fabc891e591d47cf05484eca9639639be762f85b4f800c6d8c9b012a8f1ef29bfcb3bb1a135090996a047c9727cf6c887d6e0e0af9139d1c",
    "signer": "0x7ceA71B4A8C4013A4f57c1A57eC0430915572e86",
    "userId": "31724295"
  }
}