{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "4015",
    "entityType": "User",
    "nonce": "0x9c2fdf44239c5d0aaad04c30b30be9e28c860da110de8bfd8c0a8f3e4be2ab45",
    "signature": "0xa898f8ede2e7b0bddd963a5a951ad567658b80d1495db04bf66833f6c5de9efd5728301961bb4738b8aada74df433a63bda7b59fa6d551361fdcbc1a1dcd186c1b",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}