{
  "manageEntity": {
    "action": "Save",
    "entityId": "425299627",
    "entityType": "Track",
    "nonce": "0x9e686f43be8fefa66d17bafdfe060de5cc4b79e9f52c9fb567eb0c652cb12214",
    "signature": "0xe8289d2bf0dcfa19ff6ad3c533ca0e4d79a94aee1db30bc1e426ffb173464581346d18d6541dae836e32efe133bd5e7799c19758f9bbd8b4ee85f7be15d091101c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}