{
  "manageEntity": {
    "action": "Save",
    "entityId": "868578434",
    "entityType": "Track",
    "nonce": "0xad42c4dc90ec57fe49d46746fb769115bb55241edc20f885044e3e50c9b8d7b0",
    "signature": "0xc288dd2ec4157baf09516b609583a98317c5e88e044a4be9e1de775ba72058ed13341ffe52d2cd3af9aeadd660573e7a95a5c38f91933c9cb516c310bdd449301b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}