{
  "manageEntity": {
    "action": "Save",
    "entityId": "902269646",
    "entityType": "Track",
    "nonce": "0xfdb4ccff81555f6d8116ed56295bd27c00afc66de6b52f84bd90796a50103ea6",
    "signature": "0x55e5f9d564798fba77cb82a546e9f83b7e58ed31f20fc7dca7beaa7ebc25555048622741b6036721e9634dcc44e5ad1894e8a3b8720585325ec92d9ab5e67de41c",
    "signer": "0xA66d5981794A5e084FBD9adBFF28F465924fb9a9",
    "userId": "980224167"
  }
}