{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "221003",
    "entityType": "User",
    "nonce": "0x9be1f0314cd85db949a8babc3b00b7b7cac5b701a1c7af2d98e39a94a05c79bb",
    "signature": "0xac1f85274c379c0ad1e6320d78ab4ac5760cd208f42da3bbd9a20a600d2e4bdb60ab42b4ed7a9d62c5b65a65e748e7c2bb91fbc8911567165aa165cc585e58bb1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}