{
  "manageEntity": {
    "action": "Save",
    "entityId": "566682583",
    "entityType": "Track",
    "nonce": "0x59685710408c2801168a658a22950f04f7eddf74704e1db9a63a523be72b5fb9",
    "signature": "0x90fff33f7be0e00e5254236552c0f59d48140077d9401d58a146e60acfac5fa543f592450e9b43b47df8655d2ccaae0e9b505920499435730906bd8a7a2722a61c",
    "signer": "0x0E71C12c426F5C9206F778713f48B60477CA943b",
    "userId": "29088079"
  }
}