{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3407",
    "entityType": "User",
    "nonce": "0xfabc15f223e7ac8deba503230bb256e910477c794ffdfbd56777d2798d4cadb8",
    "signature": "0x4f2b72ded6ef1425f25233d58e36a831128db3fcd246d253b6c6a49453dd13e548d262101c2bb9289a039d2f791b680b7cd0e89cba33121c955ac4fdb7e061d41b",
    "signer": "0xf76Be3e57D30ebb176cA7D31f49157c7f56E6b0D",
    "userId": "204302128"
  }
}