{
  "manageEntity": {
    "action": "Save",
    "entityId": "1089900043",
    "entityType": "Track",
    "nonce": "0x74ef96669854f2e59dab9393123103f6de8fd8b17d55e8bedce31cc422c0ba32",
    "signature": "0x7897202e2bb2c20f0d0d10b98ecfc709e97d07a811c7ce17b2f7e7f8e8e1b4743c378d70c65c398dc6217855ddf7ee4258b8c4e3a6a7bb9bbfeee34b2b914fb51b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}