{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "407339",
    "entityType": "User",
    "nonce": "0xbbf610c7ed3894773efadbc6046437774dbd84bdec5704f1aaac33dccff750ff",
    "signature": "0x7a4650a18acd2717dbd7560d8c51a8b84ebdff9341c099042ed98437f8bc4c8f5f2d3a4580e077f920f60a2e1ed7855c69d322d3b77153f140c89f55bbb9a4271c",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}