{
  "manageEntity": {
    "action": "Save",
    "entityId": "1677686989",
    "entityType": "Track",
    "nonce": "0x3007fd350409be3c373122a1213e1d4c30aaf9657bbd2c4de016a560497d392d",
    "signature": "0xa74bab4ed654eb7c485343186547add948e7405c255777c5fad64a3429d5e28018c0a109518b9d6a32ead888364e08e7c5902cfaa6344b2b72d913090f7b5ff91b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}