{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1994482",
    "entityType": "User",
    "nonce": "0x1343567b7130d440b1b040017223119ac22d46306e1b90bf21927b73c4b3ae56",
    "signature": "0x7706a69e4f92c4d55ee61fec83d3746648deb8af08f9f5cf34191a4200abebe23ac932d340ae4eba4e0dd817f78681bd87dc0b28b02f1d18a17308f436a0ffd71c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}