{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x304fe6ab5eb7cc59967f8463d5f1448ce1e243f549b1efa52b11d77d6eee594f",
    "signature": "0xcf4c2133e5cf28718d2e0c89bf31acb60f14c1fa58b55e8e8e17e0cb0a15216b550a420b916dd9dfc33ba90e158d938b4337df5023fc081dc522811d8f3911111b",
    "signer": "0xDb0EB9057C275EEf909722848EEBC794C00DF273",
    "userId": "876701012"
  }
}