{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "819568368",
    "entityType": "User",
    "nonce": "0xe2a723af97d86e502a5f837c193e488271f36190d68b56195a0cbdedab5e38da",
    "signature": "0x4bb010f5bb55d4a2052f7b85aa469faf574abab2df72a68c627d0c883a2b27290bb338d9125a8a552ae14ea3a71ce687b20621a883100eae579f0e61b35042b61c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}