{
  "manageEntity": {
    "action": "Save",
    "entityId": "809914986",
    "entityType": "Track",
    "nonce": "1792847809615453895",
    "signature": "0x5c0bb0e472d5c5a56d17c9f3d717019db52f899f83e9c9d018553e8e430fb3122c89487c8c8e1102a9f57a56672105d6b7ca90876a85b6d8beebe37daece6bd11c",
    "signer": "0x9B241b1a6A99d662AE67D328e091Fc94faF23fdc",
    "userId": "881446128"
  }
}