{
  "manageEntity": {
    "action": "Save",
    "entityId": "323436999",
    "entityType": "Track",
    "nonce": "0xfce29098422a8a18083f99b95fb3ca014037717463afae381c636d705ac8bb2e",
    "signature": "0x106beed2d4615677e12948b16cc6ce9192f97eeddd843ed8c71b3677fa8c4d231a3b07649dc2260d23c6c7d58829ffabf7a54b2c021fab2ea9a54a3a4f2969be1b",
    "signer": "0xd708949D0521A856Ca6eB44B4112bAEE59741ADD",
    "userId": "490478463"
  }
}