{
  "manageEntity": {
    "action": "Save",
    "entityId": "1861442852",
    "entityType": "Track",
    "nonce": "0x933d2951234f53a475d4879049403adf4a792fef9917775cae16817df6f9c442",
    "signature": "0xa160cc9618cfbd35fbe845627811d49593b930474478154acded4f2dd027773338217214406035d7b806ea0e2eb72505a887878ab0300397ce805bb2ad4306d11c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}