{
  "manageEntity": {
    "action": "Save",
    "entityId": "1544374535",
    "entityType": "Track",
    "nonce": "0xf58d27c7a000c29299c217b5627443054fbea4102e329a9fc007bdb1f8eac2d2",
    "signature": "0xc001b19c896bd148867af65ebb2247c058df9f6f60957b70a38f0e6d468cda1f00b7916fc7e3bb0f45ed36a033400f3e49a0276cf3f542d611331bf8266dfa2b1b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}