{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "338304",
    "entityType": "User",
    "nonce": "0xc028a2db7530bd6bb9445edbb0fea39b56abafb0f4f23075bc73c4e8ba8abf44",
    "signature": "0x2a3d5b5c9c03ebc5372d2d3b01dceb64f23d272cf4252b06c3d7abfb7b3877af20813ffdad1c76c414a1c72b037ac44dc70b41e7ecd7bd5720080f035453977d1c",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}