{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "863774823",
    "entityType": "User",
    "nonce": "0xdfed21e7a77bda2fb50830e34a69e2f2990b244d4aae271ad5fc500833a7cd51",
    "signature": "0x7a2e9b18f4fd6e0ef03e9c5b4192fd1bbf1afe42cd38999ee7d66bf0ed6a4da02b7f914d66ae49706eaa2ba40e52ed6f8086d2555d13156ea57a389f9148c9c71c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}