{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "512354652",
    "entityType": "User",
    "nonce": "0x400e103a47b4494559763a3c2ffa6574c91e750666a54034143378bf32df2432",
    "signature": "0x1d81ad8d06d4c818778b9661596a5b1ce00461b300268971425718b52a07dc97293bb9cd42d9fd23d0cc371168c4bbb0b0d281006e66a49a0de96b52b266ca281c",
    "signer": "0x262FfE6368E86674bFd32404757f3A8B1a189F85",
    "userId": "664900058"
  }
}