{
  "manageEntity": {
    "action": "Save",
    "entityId": "1244495956",
    "entityType": "Track",
    "nonce": "1786461193021169844",
    "signature": "0x7cb594ff1733dd012beb02bb58489cff160cf3e320f64887d763ccee212a7d737c9c5884f8d58a6f72168e7ca78fd4ef8ee47352ede168e4df12e635eaa0a31f1c",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}