{
  "manageEntity": {
    "action": "Save",
    "entityId": "533462",
    "entityType": "Track",
    "nonce": "0x43851cbb2126c097a2347faf91d4a9d4c153cd27e1b4503a711160b11aaddb75",
    "signature": "0x071d0a765ffa9d2057c9d2e5a86bfc8b1b480ca05899af2e5dcb36c19291717861a5dddbda3b319d5fd9285ca43d6165e46f7c81dccd1ebea9883f11edc232371b",
    "signer": "0xb23FFd6D016E95A4022Fbe25C4a1179AF8492788",
    "userId": "990308344"
  }
}