{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620307004",
    "entityType": "User",
    "nonce": "0x30a7c085158527dfed3fb91061aa308dd656be51c6708159887876051f952ef7",
    "signature": "0x1bad58492c567ecc866ad1e5eb759f89c0bda2dd28e96ed1905ed8a50fb55bcb2f80327468f3a6b9ae4dd285e9012ffe93a482174c1bb18595f532ea3b22f0271c",
    "signer": "0xE020146C7aCDba5DC9524606CE182F8A3c1BAF36",
    "userId": "294330"
  }
}