{
  "manageEntity": {
    "action": "Save",
    "entityId": "1669826788",
    "entityType": "Track",
    "nonce": "0x69ea2111da4822d65d789b201ead2305faf83167e1b7c3060ce726b81f21f229",
    "signature": "0x94c3f139906168de61761bee3b600114e5e360ded192493ab8aa1648d3097a503ea666f7fda6b4cc1cfce02f64d163fdf010e95674b0aa46a2c0df66076029531b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}