{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "616384687",
    "entityType": "User",
    "nonce": "0xec1ea0a28ed47effd0baab82149273c9ba87ad044f600a60cfbc2dabd0f84c9d",
    "signature": "0xeae18debb63f811542e09fc0ab835b9b8af5f8fc278d390d4b1c3840ae2a7ffc124b7d604f37e3c32706cda5bef28f6333ca008929fc0e3ec7d32c6bfd6aa9781b",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}