{
  "manageEntity": {
    "action": "Save",
    "entityId": "210153",
    "entityType": "Track",
    "nonce": "0xc214847b87c9c67ec0f5b8c3f0437158b249fbdba47bfada11826485698ab2e0",
    "signature": "0x283a321f4175cc85e023982d3028fd35a6c4ba10733f4a3fc407bafc202684ef380ef9a41bd98123597848cc7e443a9d6383a99b2ed5ffda8a6580f06c603b281c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}