{
  "manageEntity": {
    "action": "Save",
    "entityId": "2134088352",
    "entityType": "Track",
    "nonce": "0x944adc8b4927d049494ff613a1027473ef041feedf7d63d33326f56e648ff8c0",
    "signature": "0x9820f9af123e9b9c06095a8150202718ecb60976fb7e131cdaccc1c432b59084496b5c2d2858f6e98daeca425128fc85f8bb6bc2a84515a5682fc07fe75200741c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}