{
  "manageEntity": {
    "action": "Save",
    "entityId": "1333577457",
    "entityType": "Track",
    "nonce": "0x0cec480d3804690582bca4f337ce9c54791205c9ab764a224e0949b9c93b9ef8",
    "signature": "0xc467f8fc457facf03bc65a48004cb1cc72451fbadffe263e7f89a010ed08ae45390e45a16a2fac52f4eee80ae401a714d5e124c63e354250a22f62bedcc995861b",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}