{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "781543844",
    "entityType": "User",
    "nonce": "0x99b43e0a7aebf0e3f83c8ce76878a5280d63e76177c465e5223994c2df14ecd5",
    "signature": "0x3f5d91745ea4ce73bea48bb36a161f62883f823880c4c6cb26aabc58b35b5c8973c841e102e2e4989023dd60d3458bbbaac994f82d456e80cad95c5d98fba1df1c",
    "signer": "0x4E3828bc809fb5B9deb81fa536cF73Dd5bF4eeB2",
    "userId": "185184169"
  }
}