{
  "manageEntity": {
    "action": "Save",
    "entityId": "215172811",
    "entityType": "Track",
    "nonce": "0x470a74b542f9eac28f0d188163ccc126d201643672ff7c267c9aa31601c2e0c0",
    "signature": "0x776c0880da6ef5bc9f3055fda4651b96390aa15518baaa6cbb5767125f11b0d80dc6869962a0111dc6fb18f368c770ceb7d3fa26acdbd004fcf2ceceb896f4121c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}