{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x8371b4281aace5b8a0f08fa60109a3ffbc1d7874b91288f44c0f5d5e57e0f139",
    "signature": "0x5905a8af06228390820dede0b31f930c15e5a40ac5358edd6d58b5539520815c50c114257d921ab440c2b56ab94b8bd2930a086fe28e3cdd2bbe6c1307e24f0e1b",
    "signer": "0xE5d53C05CD9E69F9cb1c543A1f012c5c445c6B9f",
    "userId": "498363057"
  }
}