{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xd101ee84d0b8182175e93b30d207a0b7334b99ae1efb4e4fa47c662c3363eb4f",
    "signature": "0xe5a6eb75bb417ca8db01facf5baea4a7baafbaf52ae7a6dabac1739c9ad07b791f951335dcaf02add5f3776ae2a6e32ab83d14419edaaa773161b8e095c81b6b1c",
    "signer": "0x849b8180f084363b37768C823c174C9786020A66",
    "userId": "817339612"
  }
}