{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xc5ec4760a6356f884929cfd83a7a3025cab2b3af2e250d5d894bf59d606714c9",
    "signature": "0x2890669933420b7793af182b959b4e17671641416caee7e784cd4b028334e1225c126c45d666fa01a3601ab02529e488cd5aeade639ed16bd867a1ee25b91b941c",
    "signer": "0xdD03ED106abBEF4982159500e32B8602B985a69B",
    "userId": "444965341"
  }
}