{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4454261245e8f8d08e507ce8a0ce2b5ada1c902c19ea3d274f132e343e632a5b",
    "signature": "0x83331baa61700d0bb09e6cc6c8440da53620f53cdd3509f26ceba5a0abc96db413625096e4e15d7d6202b89252445dcfb82f56096b9c8ac514b6b15f477624d81b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}