{
  "manageEntity": {
    "action": "Save",
    "entityId": "900959310",
    "entityType": "Track",
    "nonce": "0x95f153f2b698b0503c02b4e4842f363364c2491adebfd370400485c7dd88d73d",
    "signature": "0x6e1fd3c165e2c7a11e71d5af39dab4f76d5544f3eeb2e150a1868a6f848f075c05f9f1b486ae4a468f0e7175aae99eac26a3687fd01ef4913f0d539babcf23181c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}