{
  "manageEntity": {
    "action": "Save",
    "entityId": "235211",
    "entityType": "Track",
    "nonce": "0x50a59b0a2c1b8954c1446515263837d5b57fd7b1f0907d88f375e127442ba367",
    "signature": "0xcc47347a96baef4a380a6f1b5381f6cafe579a4f8a8325dbff1fc17a697eeace7897c97b670ac4fb320019a9526784c379c6cc88e31bd6fbb39a6f0efea52c351b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}