{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x83dd28fbe559743128fde4f7f56889aa3d3986f0cd7203124d93c401252875e5",
    "signature": "0x1959fde5cac4b9f65c2d1ee631ae0d6cfad3b693da6690f6a16dc003ba149b6d64cff026bbcb2ed7c337eb12392475358e057fc5866e4e9a1395c91b23d49b151b",
    "signer": "0x24844077bE6bb825c0548F36B4EFA030d05Ee1CD",
    "userId": "601282125"
  }
}