{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "614212580",
    "entityType": "User",
    "nonce": "0x208b7530c0a64481fcc31a1096b7e37801580130004998c8d1b2e6d8577137dd",
    "signature": "0xd895718c82c3a3da9d1dcfd7e73b1ce214d100a13f1a96f014ab06591eca365c303a0fa9834154292b97b14d896f603f906be1f5a8a13a04f33baec5fb66431b1b",
    "signer": "0x7F52035F6FD8a71240adf35768244d51512553c8",
    "userId": "550902409"
  }
}