{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "728570067",
    "entityType": "User",
    "nonce": "0x6f7f5e13fe30e323abe920e43766ae43d012c35a415a40fc422f36b7ae5db9a8",
    "signature": "0x2951b02dff9589dad9e9d395574285454c12285765774268fb35f73e72df3a400a2c6dd45df148e5cd859aea2d98a7694f441cb30125ade45721e690c6f3f54d1b",
    "signer": "0xb7cfC3e8ADEA33d90F4f4B34f672a1C391955768",
    "userId": "120328"
  }
}