{
  "manageEntity": {
    "action": "Save",
    "entityId": "369466",
    "entityType": "Track",
    "nonce": "0xc228f4ee0367c1fa87787f5a8f24ba5e06374d9cec06cbcbcfd4ca43bcc2f73a",
    "signature": "0xf32cd1b92ab457fbb4c2e4fa98c7b05fe0c448578833564890065ba3951a714129307525631ed99c35c92f7e5b47bd97d25ba95771c8943ab5e4cd27add3db4c1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}