{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "428192787",
    "entityType": "User",
    "nonce": "0xb89ffd51bbe9cfe9e559e237e1eba8925537fe3419efb5e04014b3d47a73fa08",
    "signature": "0x3e55e3fc2cbabac2b0d5b2b762b980567be7523f88b18a11cb121efdab5db9ab67d44b8e51850e265dff9f4d94212e06b0e6ef67f7cf730a29aaf8f8d4b08c231b",
    "signer": "0xC75a276D0a36850045510B0483E737bCDd1F5E9b",
    "userId": "588125677"
  }
}