{
  "manageEntity": {
    "action": "Save",
    "entityId": "384299055",
    "entityType": "Track",
    "nonce": "1792380735297031030",
    "signature": "0xbdcfc2a7844cc46da18533aaa1f0a4a00549d6984f5335d2061d934c476590c84f4ad54210017e6c7eb9ef4523b6c1d4d2638c1f32a06bcceb2f368b6a2612161c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}