{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x6987c3387a119b8a1733cbd87df2cfd6411968d00b430a8de7f98c9756240c2e",
    "signature": "0x8bc25f94b2083b7da2df4d725f0f769cc3167295902a3db0b2c9d4e8da5c9e9b7d11575896d5940435b95b82d5b26c29a161126d17b5133c5f2afd51763b5b391c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}