{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "677485003",
    "entityType": "User",
    "nonce": "0xdf14ec611515471cbfbe7b1e68ae20b569ea76ce5e6d83541fe5a1d26f7176af",
    "signature": "0x80c9d9bbb0cdfff198de8b76b6149f80e0871595dca631c01f7a45e889008a48588416b0eb5e791a758fe1d59479ad438c95c64a263185ceaf0241e57e712d0a1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}