{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1104",
    "entityType": "User",
    "nonce": "0x2571aeda1304c9b169414981c45ab28301ea615f4c4ca12c4532c756ebb74c37",
    "signature": "0x15180f18beb522376e0d46c2252eaa94f3e7a8ff048b4395b5c2f1b221d2c0221ed6954f3db2ea5d92c3874222f2fbdf605fbcf8f3ec168dfd734f65dea444561b",
    "signer": "0x670E4517CCB95F2b528b0D6B0E50DC7a0f51f838",
    "userId": "555604608"
  }
}