{
  "manageEntity": {
    "action": "Save",
    "entityId": "1897880217",
    "entityType": "Track",
    "nonce": "0xe1b6b75ba4675c9e40bef6ce2d2153cce664ed8064384baf6fcb3cf667fa5cce",
    "signature": "0x94331739f8cf596f42dc4143f3caadb95aa08ee659faf931d01337d838526e45648c1b3f968c82cdda830b0077f93dead32bb29523ab22a1d34c8455c05acb121b",
    "signer": "0xb51B50C9b7d88C66d31539161F4BA9Dd72a17dF5",
    "userId": "465531556"
  }
}