{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "100403",
    "entityType": "User",
    "nonce": "0x721808e084dfa9faaea093206176b8b148ce7ec19feb09201e441e2d9f05536e",
    "signature": "0x244efda58f8a8d827916aa80bcf47a6e652f41d4a985c8f792e39a578ba92e613e79431ac1d6a325a7a34220f40044d170bf93cabcf42ed2e7d935a8358772401b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}