{
  "manageEntity": {
    "action": "Save",
    "entityId": "1398460602",
    "entityType": "Track",
    "nonce": "0x43d16dc96cb703973911b5bc64ae29cb76c2bc8e74f29e9a5a4e411158598c09",
    "signature": "0xeab0342716e2d0d8886e28e596aa19d890f277565b3533f6010b1182583b53e83bc82cb1740d3f600e87316530ace478aee7455ba208c732f692f731ed3accb71b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}