{
  "manageEntity": {
    "action": "Save",
    "entityId": "2106304015",
    "entityType": "Track",
    "nonce": "0xa4e71e9c2b1fdff7137abc98d3ea461a951d07e6bedc97daeb3b2d604e2b9b41",
    "signature": "0xe0bab0c799442d70c50465f201d2c3731b6a1f63bdb55343dd533eb999c5652061c4105a7cb0097adefe3c8f196469be1f5e517caf0de028a4408d8f3ca2b1b61b",
    "signer": "0xA66d5981794A5e084FBD9adBFF28F465924fb9a9",
    "userId": "980224167"
  }
}