{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "305916",
    "entityType": "User",
    "nonce": "0x18426a24740a2e4f7b331da4a64d347fa479e47c50a1ff01a193f1784d65075b",
    "signature": "0xc3efe3e3f3bb52b4fae7cccbd5d27951ebca927b32e29aee23616b138860cd007fa90fc9bb4bbe56c454c645b47a1f67cb8e064d06cb7956cf7e886c3ee7a2ac1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}