{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x6131d37d3983b142af2b6aea57e7e84007db424d2d33c37683e5404636e451d1",
    "signature": "0xfd75dbd5c38e5506da914a97fed78979f39b570b3965cb8b32c85cfa98ea186310d6b75c8263a997533593f82aa0da85af5c9b785dd44b9d9651e30eea5485ed1b",
    "signer": "0xC0907a5fAe802CD35FC578e65C0ee88819E97908",
    "userId": "140545488"
  }
}