{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x3bb2e6a31bc120b177e8a34cb804591bb8d45e7045ab67f83f9a5941bc51c26d",
    "signature": "0x537ff446842542861a012d9989d2e3ba5697e3f1a46fb53dc06267ddc0032d6232a86428742c34ea6f8feae9c4f0a9390f22b3102fd92e7f229c1ebccd65bdaa1c",
    "signer": "0xf6c9943016137F3054658e7E14F51B6d271aC325",
    "userId": "644767279"
  }
}