{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa527b2ad89e15567103131005afcec61d1265d3042e1c628ba3f8825773d429c",
    "signature": "0x23594f31a5330f7953ded4c19e6f29a1c0b328cc4d954bf2a2ff9e87bdf7eb604b27729da21bede94f26ed256d768ca6c1df2c505597d2403a342daf5fa7b30c1b",
    "signer": "0x05879c5e12AD06542dCf5d3192dDDeaa2faa3754",
    "userId": "445555"
  }
}