{
  "manageEntity": {
    "action": "Save",
    "entityId": "865238801",
    "entityType": "Track",
    "nonce": "0x757bbef07fbc5b8853c9aa56b2e383463d546cb72b67628b5800482677f5d915",
    "signature": "0xbfb6f6f2f1cb45be11db2bb23437607d1433dee78015d2217e6588c2658902df2a3cb6200ee5f76559390cfeb3b72fa6187ad527abe5658d8292bea50c78df671c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}