{
  "manageEntity": {
    "action": "Save",
    "entityId": "1421622783",
    "entityType": "Track",
    "nonce": "0xde6033fde42aaaa5a11e358b8416fa17418e1df193cf9ad92848327078a1afbd",
    "signature": "0x5758f5c9e2bc512e89c79824436d83c32c24b9d85105106753de14ed6104e0606f6eb70ec7e45f35a38de83265d66f826267929f0d2d66c864b6da92fad1378c1c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}