{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20512",
    "entityType": "User",
    "nonce": "0x44b484ce92b2d2f8ae5373592b6c6a9f0fe26bc659281cba37b6ecd3d150a36a",
    "signature": "0x679d67d071bff3843c6d273c8fe967b8e442941fc29d12e363a429f3462b00bb2484d00898fa04d416768a6a82596a6b61ab9e6c83071340c78d039a91fca3e81b",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}