{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "12001",
    "entityType": "User",
    "nonce": "0x7883987881db4a812f652208713446707215a0892cb30cff09e15ef2b7cc0f0b",
    "signature": "0xe00a78d4a53181aaeb770cd73ae4e5c4978c6ce4201c9e7370c5120e3bcfd44e3f1fcdf29f10ad70c471ebba2cab56bf76e2f8f4d2fe76d0362bb8ee1cd1cf4c1b",
    "signer": "0x10805E046e879D8e4503D67e495Fd1d280142e5D",
    "userId": "355715"
  }
}