{
  "manageEntity": {
    "action": "Save",
    "entityId": "1816524257",
    "entityType": "Track",
    "nonce": "0x05a78e5923e3ef4f8311dd199189cddc0eab1a82592c953acb6f6ddd2ded0a56",
    "signature": "0xee8406dd2b9ff57e1bca37c4da3c4fe8914cc970e5b99367c456b089577cc6c3575e8d449938c3da580208ab823afcb109ed2b38a23ae97a814ce3171a094d531c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}