{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x159f9adbdb941d2c306e67e0df50c762f3bfbf394e0a78d1d5b495034d719dea",
    "signature": "0x5346941b1372b6dd59be0bc2eae49bf8786d76954ad579e83bf2f52c83d68a3b483ce626f1ef8ab9ceeda43f229023035759ca1b3eeae0a5b0b3721846ee15e11c",
    "signer": "0x14255ecABa20F3DC6b53A58649FC750c0F6b996C",
    "userId": "787610173"
  }
}