{
  "manageEntity": {
    "action": "Save",
    "entityId": "344088589",
    "entityType": "Track",
    "nonce": "0x35537318f2660534fedee1032d09231085b129496742c97663a6442478a363b6",
    "signature": "0xe38f3db112ab58f08b960bcf13c954c5d0031b6385ca164d8fa38c10f497e3f85c6bee0ae480ca5e020a7bbce524515b9eec52418c918c2732505a7c4b9c3f411b",
    "signer": "0x1082415EFA5776d02349259E79f16b4C6706eAD2",
    "userId": "699222924"
  }
}