{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xda1bea4d4bf1ce17d59157eda62321ef049a764253f3ce9d6facb947ca677079",
    "signature": "0x2a59cafcc583f1974d83082b7a74ae7ad45e29a61b738ddd4e539c8d116f8fca39f2dea61d424dbfffecc8933f5442e2a4f58d2ed3c30b766328381a1c5cc8d11b",
    "signer": "0x4d6701aee41cF386F0f1Dc360F47F200983c6c62",
    "userId": "454478631"
  }
}