{
  "manageEntity": {
    "action": "Save",
    "entityId": "823393987",
    "entityType": "Track",
    "nonce": "0x42d9abaf22fcfe0feff970dded5c8acc2399d9fc8febffa38108938183983314",
    "signature": "0x34770fcbe5f7354b641f05d2270d3d3a9fc156a63d50c217d701dd3b8c0319c311b016d91baea016added586d7cb23a553a41bd14ca6d121c9e216bec7832f371c",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}