{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "16445",
    "entityType": "User",
    "nonce": "0x1218b57555e373743d7ac742325a4c9015412615c573b7943f0d4d63bf6a7103",
    "signature": "0xa5e62041fc9276bf1b5d1bd93493fb853c373112499307691ac1b41dc76780301dfc9ddd236b8fe90a76addf1642eed231bb627d93433dcecd8879e0f990e2f81b",
    "signer": "0x41Fd0c5C6Ee46Fb99a498db2e7135c69490cB85F",
    "userId": "507333378"
  }
}