{
  "manageEntity": {
    "action": "Save",
    "entityId": "366729711",
    "entityType": "Track",
    "nonce": "0xf67b5acbb302fda1a920a085cbf76d94ed2140ad445217b1f07c91dc49fb9d13",
    "signature": "0x6eec12e09b9fe29a7045efe27088d9707a2d620d1e82c1adb2847f03ba1523625bc73a1312274dd35bc6c13acb972b853cafd5a07476bf8c55024873ef7d5ea71c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}