{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "378244521",
    "entityType": "User",
    "nonce": "0x2b21cd54a8ae928744332cbc32fe1db4fc9708e3c1190cfae17b599492467482",
    "signature": "0xc74e9ad7cfa0592be81e267b97bf5c16d7ece63c3d226171c54fd8a1f8b06ee47f22f36ba77c05722ae7f9001885792d2fb972e1ea8cedba66e2acedccb512231b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}