{
  "manageEntity": {
    "action": "Save",
    "entityId": "1765696707",
    "entityType": "Track",
    "nonce": "0xbfaaac8785d5e5ef4a8254efeaf113cc5bdb196b3e5d4516ed6443f4280306f5",
    "signature": "0xf241e01836c5ef47451b97221456d412e1cadba00bd2f482e8c0667b2f43e2894b8a2ff845d2581ac073ae6e47debdbb34d49f7bfcc7172df25eaf5ff72955181c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}