{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "343",
    "entityType": "User",
    "nonce": "0x0dfb5b1976688d516412ad8256457950cf6262ab5108b85c36d82e2d13b89be7",
    "signature": "0x75ddfdb1bfbbae8cf6ec9da2571f1e7d972eea19241c61b6e20c24d9de0ce2de171686b8d01db05a9b0f33d85eae0cc977958da7595660064511a35fc3aca6ce1c",
    "signer": "0x4Ff77Da6D5C7286ea15F7F94FdCC04a641dE9a27",
    "userId": "512734349"
  }
}