{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x2b454937449d9346da8ab14479ca021311e25b4695d027cbe95e7d1f1ae0bc7f",
    "signature": "0xa32023f8a5b704abc34e09246a0ecf139789feb66d3f0cb50f2648b4f29f92f23beb132e5390eeeb3f00da14cedaaf9d40bc983788e1be342f6a05863d8233511b",
    "signer": "0xE1Cd8442CDb291029944D1E28c6Aee528A39C225",
    "userId": "423725296"
  }
}