{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "102143",
    "entityType": "User",
    "nonce": "0xdd223703adc2c7fd7fc3e1e2491871dfe5e76fe2d15d69cece27b65856bd226a",
    "signature": "0xda47136b1832b0a273bd7c4646ea926beed4ee5dc9796143cc05c53fa98626463918492a7336c64d23fef4e6fae776963587280ba82e4c62c58a0a5b60c007771b",
    "signer": "0x57Ad6E2E3fFc5ABe9b5FE7DC3bF7c07c8cCf9Ccf",
    "userId": "571702334"
  }
}