{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0xe973f2f004b302c439aba032c42264da1379445a51d8901a84e4d4afd378a921",
    "signature": "0x1b8d2b3791be58d78a7fdb1d7e3f2fe307ce2ed5a8c77ccf20883228ad15a540549803bde264c038564604b57cb9cbbddbea08e356e55bd19443b09aa293316b1c",
    "signer": "0x2332A7D4Aca43B85b74F7f8c9bD5BE2578aaB30F",
    "userId": "227952557"
  }
}