{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4498120560266d392b4f900c2633e5cb6e8fd861f1c711e55c49d3d6c6d8a81b",
    "signature": "0xba7ee1471191aa01195926c996d4cfd50beab6b07462053665daa7f15824d4762499383a6b4d1a7ac631cefffca2de8d05a39487ea83c68c72cedb72eacb676e1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}