{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x836ad71820a0259b26e2f513573b06bd990fc812df7b6ba162d06f6412ea1998",
    "signature": "0x87c36d521be9699389f5e496a4d28d85f20c82cb22ca2e72637e3ae8d62a7d0429b84adc17c4c53d0c371ef34974115ab85454926f3159ece647cf8cd8f81faf1b",
    "signer": "0xc9dC0890a868C421E2eD48aDD2fABD63c8B71B9f",
    "userId": "893310146"
  }
}