{
  "manageEntity": {
    "action": "Save",
    "entityId": "1599553100",
    "entityType": "Track",
    "nonce": "0x2b4317b51a3291e836198d9e0a78d10ee2960f2f18d9ff764aa136e8735ce36d",
    "signature": "0x60443995b62bf51050dcd10ee4f4013b7d402f31e209abf5b6c6b61552b8dab8383da769f92dc5bca2eeec23f3557cdc27832555d76c05ff97cdd6d2f827e2351c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}