{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xd22009971d3fa1703f8a427d91ad2e17359060e7df17da322d08b887470b5178",
    "signature": "0x71e4472d0d9ce44317e5a2e96c38ae0d7061cb28e826fc1406e514f542956c0e2ecd82faf2ea5661720c4a8ca3a6488cd7bcd127bafbe439bd2c351f353fe3bf1c",
    "signer": "0x5e64f244924C507665E7fbC2c650d842391E5eb4",
    "userId": "299955678"
  }
}