{
  "manageEntity": {
    "action": "Save",
    "entityId": "1975126140",
    "entityType": "Track",
    "nonce": "0x757115d1114b4f199c5752460b5b672d67804ac1fd3c9345f95e02af499d3468",
    "signature": "0xaea57d8b594d493b4096de1fe96878e67cbe5b18366a77cd0d715bcfaa4fad7c4bdb1e0ab0f8a3ae3abc69631690bca1fb7cf0162f28b01c52948544123977db1c",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}