{
  "manageEntity": {
    "action": "Save",
    "entityId": "368342",
    "entityType": "Track",
    "nonce": "0xf89e9de6540c514f6d3c3c835711b6a7a66f4956de47e4506895e7398ad1d8ff",
    "signature": "0x9f99c8c74a6f3480b93ccdaa4df84737033d5a41ba97418e7552578763084d5627c06944fe2a6b147086ca7d2077ae55e6156383ee628d9497c29d6554c09a2f1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}