{
  "manageEntity": {
    "action": "Save",
    "entityId": "761268",
    "entityType": "Track",
    "nonce": "0x55c4002a7e4d6e11a22064b499a4bfa04deb55ac6235d7b99c5e8d89916016b9",
    "signature": "0x0f43f0cfd29f9e8833026695ae8532fd4c008f3b9a7c06f7ebdf8aeb96ca35dd2b8ddb3f13203a81cce42e9996bb33c61050ec276c5b573d19291df293388c341b",
    "signer": "0x80C50D421b99F3320EBF757346be681e935CE5f6",
    "userId": "1202599"
  }
}