{
  "manageEntity": {
    "action": "Save",
    "entityId": "622301",
    "entityType": "Track",
    "nonce": "0xe09cf3063d7d29ff29e001f6871a921bce917a7f36a704d72c9d28fbcc898c5f",
    "signature": "0x33f556c3d17fb019b5478db0b2e838e27e7ee16f05dfd2b5e988fb5cec1c3add4b64176d7ca76b8ebe69b74b817dc0ac3ecf1be539ab1492b423e59eb79a25c21b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}