{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "438490",
    "entityType": "User",
    "nonce": "0xbec4a7ad98f5b4e33f747d17935d957c8edba23ba03e8f5c1764ef05876acccd",
    "signature": "0xd4f4293f5e2402fedc79a7f43ffd2e9df12974ce9e53cd2e6f0c2982e53a645a25b3d2f7a173b11809a1cb1bbd09ee1554d8c068702b1141562fc871088759161c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}