{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xe810bdeeec76ae52290a24814f079e459c4ce5d5cbda40ac80e27771efb28fb3",
    "signature": "0x1efed1ce0105387bf48769709742f39765cb8a9973cab65ebeb9fa894ade12c23897122157a41dbb393536155e81f2085c6c06348a2d7f6cd0f22806ef8bb3871b",
    "signer": "0xa603e9487Ed7C3C62E8acb85f8f32acFf5d6349b",
    "userId": "278135553"
  }
}