{
  "manageEntity": {
    "action": "Save",
    "entityId": "1723566456",
    "entityType": "Track",
    "nonce": "0xda78b0a1b29e37565dae7864a7c99f9532bda4636606fb58326eea83243a5202",
    "signature": "0xdd026999d680480761ff774c5e97eef5241b865bf2916a79e5b7dc243c5046d134b3bcfe486157c84be3fc7650b1a4694fd617f66dc17655f16bdc8bcfdc30c51c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}