{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xbdf8a687400561e9006d1978976845f3e207e6e9c1aeeff43d20de1b4bc106ba",
    "signature": "0xac45bb9b03c056ba3e315b4e1ac34438b4ff7fbb504715cf28bb945924bf178f7b7dc65988958f8fe19501cab7fd457bbd1f80ab09a473ea71590fd6309dd5841b",
    "signer": "0x7F085756012AB9d28d5Bc33213B5e221bec80739",
    "userId": "377266840"
  }
}