{
  "manageEntity": {
    "action": "Save",
    "entityId": "1505709836",
    "entityType": "Track",
    "nonce": "0x6a2f02585178a67a12c3ceaf893945beb2e3eb0cacdfa36facb8b7dc04a110fe",
    "signature": "0x6d2c5af5cddf16b79663c631ebdfa89784932e2fe0bd807c506404acf48a719326f134e1e850ec4720cebd2bfcc581558a343a4aaf31d6d216012b7000147b671c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}