{
  "manageEntity": {
    "action": "Save",
    "entityId": "1519750466",
    "entityType": "Track",
    "nonce": "0x049365e4edd983df85c240b2eae8c244ed1c7853e98d84b4caf1778f8220fff0",
    "signature": "0x05e4cd6b64947876edcb38f32abcad02b0876638a2ed0e09640adbec1b147d847bc2fef164b86dc5ee34b95b53b2d210b5e96c355038ff5eb891d9c0e580f97a1b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}