{
  "manageEntity": {
    "action": "Save",
    "entityId": "1351678213",
    "entityType": "Track",
    "nonce": "0x89ea53dc6d8bacde4ea1096a253bc54558a1d3b0dd2fe42456cb2f747e436c3b",
    "signature": "0xe3fa1a3aaed42992dc6b7141db6fac3a0a6375c5fea997c1379178612926b0a90e5d9bc8fa8d1be805c2e1b4ec08fc313ab0dc78d2dbb9788a465934f33783df1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}