{
  "manageEntity": {
    "action": "Save",
    "entityId": "128744379",
    "entityType": "Track",
    "nonce": "0x2041858e2f446322be6d3775ccc7c4a2c921176ce5839c67f317554c86a09922",
    "signature": "0x328aa09b5e8bf2818dadc7983bd508e0e39595cc3477c68ffd0548c7f4bf82486dbbec2a87fea7b426b72a3b83fa012ec82bfcb921ddb3f19c39f56cf11839861c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}