{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "667809204",
    "entityType": "User",
    "nonce": "0x7101c65d51d529ff5da4c9655e094cf5e7ea94a8d083692a04f7823611ac88f3",
    "signature": "0x29836d89a19fdc5877f70432537d1975b54e4050177e719abfdf1520c1b9f31043b786d67f51d0b3a11d215fe55bdf4befd46fd56db54c9831f013da272d96361c",
    "signer": "0x866CB73184a8420C302e3850B610761F882C4DDE",
    "userId": "166428182"
  }
}