{
  "manageEntity": {
    "action": "Save",
    "entityId": "311118875",
    "entityType": "Track",
    "nonce": "0x00be31ff9be0d8a7193522cc414e2cff36e4f09208552c3d69577517f7c64ad2",
    "signature": "0x08cc675989fe1e6b8b15e502bf4a6cec488384d5bded1d122cf38c8327a9be57510412085b96ce91971f51280d211a7ec522fcbfff18315e267bc45a231fa5091b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}