{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x44860d2ff1dac9f80891e7ba4426a6bc22fd897e0ee14140528c42ac654d2e9b",
    "signature": "0x5b3c5e78c97bc71bf7bc1e663114522b487f4719556bd37659daa954cb5c05c64489a85a3ed4b19f6a7e700fa1f46345ff40d38de57d4f704f8e2896baf1abfd1b",
    "signer": "0xf4f1a5b5d9dD70347dfffC9c35d671214f83c4a3",
    "userId": "840935628"
  }
}