{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "543934154",
    "entityType": "User",
    "nonce": "0x7f5d608da3467d5eb92e2e8cb54621243d32553986ca36a9b90086ea9389b854",
    "signature": "0xd7a1d1921ac69d9d57a406eeea475965530ca350e09c0d0476214bb99afad6650df713e7f47db2305c8e7b06b005d6ea6541ef1919da7a9fdf084c93f835608a1b",
    "signer": "0x03eBd76f03fee1b68d042AE492e5168848BEb443",
    "userId": "180170571"
  }
}