{
  "manageEntity": {
    "action": "Save",
    "entityId": "947915455",
    "entityType": "Track",
    "nonce": "0xb0a800115d0cab128b79f58854f45ea8730465848980f1e13546cf6aebf64b79",
    "signature": "0x57149e3eded4a96e5423798c819b3f3918ca0f758e211bc394005ebe9e972f82053d8f841c734a5a2c8833ea57bd78a16f8fa1b6229e6a7155eb1a8100d489711b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}