{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "320429",
    "entityType": "User",
    "nonce": "0x21d39ed9c25b54bc762b8389adf17ec0befcd5d4cbf06ac090734d5c36b58798",
    "signature": "0xe80cd4a0417f435899075cedf1305addad2e1d462617b0c70ddfc319d327acd908354413e077e920aaec8b48a7ca8d393cd33b1243b33f0aec3e4a8ffa55e8381b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}