{
  "manageEntity": {
    "action": "Save",
    "entityId": "1514152497",
    "entityType": "Track",
    "nonce": "0x09a1c76cbcaf9515c9e3bbec0900ceb044f4a379f8a90a550d055d72d92b37ad",
    "signature": "0x1b6c7f7dc2ac4526a6ffdcca671bcd61145e1c700a0d19897c208c2707c4bf336d8e38825e198d1b22444dc177877cbfe5c79d814e1eafa79b25e0c504d612af1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}