{
  "manageEntity": {
    "action": "Save",
    "entityId": "336258",
    "entityType": "Track",
    "nonce": "0x5bc75ccdfca997ef2c2a80c9e00063455212dd5e71654ec03134e9c1192148c4",
    "signature": "0x8da00a9b8de85949465c7760c78db97386d4ba9f4c93e7352d552eaa9bc140f1731a72d0b1a0a1adb26a1fd7d71df97ffe17cd36b4ff542b593e50c76f19766d1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}