{
  "manageEntity": {
    "action": "Save",
    "entityId": "178102251",
    "entityType": "Track",
    "nonce": "0xbb08e6c0cef2c8a31f75eeaa011e5ed3b2d4578f930651bea1962189b05204c5",
    "signature": "0x981f12e3165e2db34aa9e3627aef3a27874312fc4228915f540f991a7f2c5a0f7a359cc8269a74e368140ce1d05531a8bf99581fb29b4d30dc035816fa68c3701c",
    "signer": "0xd648B38B61b65e4F8df57D4EE65560D8DaacFDb2",
    "userId": "277314120"
  }
}