{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "14321",
    "entityType": "User",
    "nonce": "0xb319cb4527fc59e00c4afc8cac9ea78d3e9e67f1ff47666125abfbd691af508e",
    "signature": "0xf115283c272a4afd234bbc432b7a923a62a5e90be93df0aa98150a424a691dea3089667555604f75fa58dd5c27f79298a47c4a2503e63ce83716bccadd5249031b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}