{
  "manageEntity": {
    "action": "Save",
    "entityId": "364829312",
    "entityType": "Track",
    "nonce": "0x0790346e90c9841f2d2bc1f627c0dd5252db49c9b068aea538e9aa049b32f78e",
    "signature": "0xb7e684eea5d936f0321034ff37239058bee06e8baca0ca0e24f31217b91faf2e1b777c008369169fcc401e0b3e810379cabfd8d04d25bbd0a1020950ed8dbad91b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}