{
  "manageEntity": {
    "action": "Save",
    "entityId": "1866042672",
    "entityType": "Track",
    "nonce": "0xdc6bb10504e3029cf4e8612565d6ebce8eff8cc354fdd4e47f0f818abe9bcd96",
    "signature": "0x25a230f52193a43a26c13dc3fd3d381170eaf452b798956f6c3020383140ddcc578290c273bb84978d2646157a452c14636229d56d314bfe01d609c457196ae51b",
    "signer": "0x4a26E1fdd6FdeE62e6A343d231CF3700Bf1e26bb",
    "userId": "55875"
  }
}