{
  "manageEntity": {
    "action": "Save",
    "entityId": "1411114350",
    "entityType": "Track",
    "nonce": "0xe52529e805d00b7010b9fa859db54aba59d8923461d624b0cf82ea508c6850be",
    "signature": "0x7a6dd1cbf57b98a2cdca8432c3d0b00d254a8f5b7cdeb1c6bdff70e0dba7f924214509c2d23bf4c1a9be7abd72f45e6bb86c6ed80b22469ff93e74417b327e8f1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}