{
  "manageEntity": {
    "action": "Save",
    "entityId": "2007021661",
    "entityType": "Track",
    "nonce": "0x112838cc6ef6dcd2554372c97dc40c7cd5426e8d337af17876d845b9af21f63d",
    "signature": "0xf879ab1b079b5b134026e27b5a159fce61fe83afc98ffd7e51de160d87699a5d2be0fae386d95f55ffdc5093553e44890f230721592ac2ab3c4d9eab746222791b",
    "signer": "0x63EbE5a1B5C5F156330BDf810f5fFf6A224c75c8",
    "userId": "309080"
  }
}