{
  "manageEntity": {
    "action": "Save",
    "entityId": "978729207",
    "entityType": "Track",
    "nonce": "0xf4c95159bf1dd02e30a990a4a058dd46437ca28a90bf32452936bdac9b93d5bd",
    "signature": "0x45b3a42e6b7ba0a940e451a7632d95b78c0a77810f6ae4768185869e531509e65669a7d91f19829acf4eb9749f81b9fff53c857af3b33d2438e49185b6963e7f1b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}