{
  "manageEntity": {
    "action": "Save",
    "entityId": "346121992",
    "entityType": "Track",
    "nonce": "0x38b0bb31fdeb1cad2f24dead251c59880c1d77dd2360737466d913d7111c08ce",
    "signature": "0xe77ba78467b7bea46adb41d580f69c4a46df29796ff631bbf7c543717a97c11a4e93b524e63a919514fa60382908ac93aae440267c5420c3f487b2d0e75ff2c71b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}