{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1640466",
    "entityType": "User",
    "nonce": "0xe7e24ad6a5c6345516db10a2c52ca9a254c3e36a8320cc5c33b466ac323e7961",
    "signature": "0x474b2a04f332910dca4206d7da8c7f589a941ed248e35b61ff46dc476f613b055d3783ebe0f550d949ff841e57f9289ca6f72739da7599529de441162f4d7e281c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}