{
  "manageEntity": {
    "action": "Save",
    "entityId": "264604124",
    "entityType": "Track",
    "nonce": "0xa5e9600bbf595775289b853bef0d967204889f6574f51186a4712a97b5812c9e",
    "signature": "0x2b49f5a17ed6cdcea758d543bc64be6b6057e3190d8e561ba1394870d267567e70993c68514f4c1ac7a622c010d5e83ff2f0eb142008bd4e3291c3ab8331904a1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}