{
  "manageEntity": {
    "action": "Save",
    "entityId": "583925465",
    "entityType": "Track",
    "nonce": "0x3f3677abf87f226fdce33bdae405ad2dcd244787d7d22ebe5c685f7df8fb0a36",
    "signature": "0x055d68897d3a8ed5bf854cf0fbd838f6fe4f14b74d5ae61d388f718c7c54bbbe519f47e9915a8880eed932257dc920f511f7709a1402b6f412d9fa4a461ae0971c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}