{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "21841",
    "entityType": "User",
    "nonce": "0x91949d91a2f9db14dda7b09e26da5336d2a286699a262027a65e4e2daaa70015",
    "signature": "0x87417f037ad6ca081ac1f9bf6b668319f70a4591b49b696518469d9c7672d6962d2030dec6e8e151c2cb26a2631a9672659475a9a2c9575d5c343529f54248f01b",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}