{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "603549127",
    "entityType": "User",
    "nonce": "0x1873f208ad4d7fc22870178ffaac14e99a121c5f6e8951e8376266036caee939",
    "signature": "0x82e88bdf04f4f6490b6f42d2e5f44711dbb3322a3a64b31798030e6102c302ad49f8ffabcd5b55a6dcc297e194c6c6351f3a98d8cc52f71401bca8d38ef5e87e1c",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}