{
  "manageEntity": {
    "action": "Save",
    "entityId": "498287695",
    "entityType": "Track",
    "nonce": "0xd9835f0dc333d744471d2942a161fe1061d382e8a48fe8094b3214b3a5f37480",
    "signature": "0xbae428e3108ea85fe682326099a190a1c2f65cccdc8df8699f565312ab0741034b3a366de71150c23e7981853cdb09982c599b8ce21c40ca7c4b4cf597c403231b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}