{
  "manageEntity": {
    "action": "Save",
    "entityId": "970058734",
    "entityType": "Track",
    "nonce": "0x15965fea3162d0e2c7b10ada4fc286b71724427953a70fa70adfba098cb26cd6",
    "signature": "0x3ad19dc93c8a5c84c78b2e30ba9ffdd39ade5b2ca1e57da427472d6271febab2339cb25cef2d876ddd016ab03d2c4fdcf849007453a068fdc8efd7d95b56a96c1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}