{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "843421708",
    "entityType": "User",
    "nonce": "0x586b72f8ca562ad228e8137320ba702437248c5dffcd788679df2163551a8223",
    "signature": "0x752099245234ef12cd82561ea10af3c20775c3f77c4f16795e8e9472e3f6a47474f3a21f63f6df3d4cbc55d43bfe93b38274daaf1165ee78fcb0030a22f67ad31b",
    "signer": "0xD4D0507E1111FFF6D30D7F7914D03Fe8F773326f",
    "userId": "310671443"
  }
}