{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "446645802",
    "entityType": "User",
    "nonce": "0x954253ea5fbe2dbe220d5df8594583a58f05f3bf43cdef35a3b32dd7c568e750",
    "signature": "0xc665c5f3be3c3d04258dd5c537719359e7e73db958375d2dfa78d7ed8a6e8fcd318ba01b4aa50d01177340787ab3239f89be3b022a81c9f489aab2f62fd0a5b41c",
    "signer": "0xb001DCb64Bf57b3EcC76C4Fe5AbfE2a8B084D6ba",
    "userId": "641557420"
  }
}