{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "648816889",
    "entityType": "User",
    "nonce": "0x4910539e8e286b4ce76642a1c4bb0c97b333b78e1f2dbb3a2a5de61419262f36",
    "signature": "0x54282c9124042eda0cbc63615c518179f114c4338d633cfa0af03356f818870a19c4edd092a9306034ffdfddd8fd703f5e4833826fcae01f944462b5c2ce512b1b",
    "signer": "0xd489B786708CDd8661b152CFF27695dC12c8c0C9",
    "userId": "647391197"
  }
}