{
  "manageEntity": {
    "action": "Save",
    "entityId": "1346921521",
    "entityType": "Track",
    "nonce": "0x4dc5052f8a97062af12783ee6080432296571ec86e8905a870186b9faf30724e",
    "signature": "0x6fe3741a4b1ed9fdd7957eb29533b3a04160da993e237c7d71643eb6b0f975503b94bb7d155b6a12b8546c1a2759ea35e530f1812a6e1339f453fcda9ec9c9cf1b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}