{
  "manageEntity": {
    "action": "Save",
    "entityId": "1049775417",
    "entityType": "Track",
    "nonce": "0xb00a5a451588fc725af43ba9b25829fe70bf8fabc415bd126ef3253733eec460",
    "signature": "0xfe2ce9d480676294b0128c433907659ee41575f02a5c928a7541c000a93199a45b407abfe73df5c0872a843c376fe7904bd74441d85570efb60ee5bef91e0d4b1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}