{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1646345",
    "entityType": "User",
    "nonce": "0x54b8ba607ff0d6f1ca7ecb0ac1ee57ae05deabfb4ce00d0e203c5d1f616cd0e4",
    "signature": "0x5460dd66aec06f2d7e274fdc634d5243659aaae3a553ae5d19b3b6af9af00247147e383a6610141c3dcfe70564d1cc4467cb77be3d88c4917fae37bea385ec711b",
    "signer": "0x40E8E224E8F8a9f835e4dc8851Da72DCEd75986F",
    "userId": "504092010"
  }
}