{
  "manageEntity": {
    "action": "Save",
    "entityId": "1368575554",
    "entityType": "Track",
    "nonce": "0x50622d55a9d4c76ead5614956fa9bbc7285f553691d7a67f2cf4fd03ff70b9db",
    "signature": "0xcd071173ddeccd1ad787a6b16bdb437264d3fc92633710f0f1852559334df2f657eca5b98cba927f21d6d55b50ecd74f4a894022e2249b730cf4be49cf6e04ff1c",
    "signer": "0xF08935327AeC6306C8d0eb92999567e5496848C9",
    "userId": "989073793"
  }
}