{
  "manageEntity": {
    "action": "Save",
    "entityId": "1686833913",
    "entityType": "Track",
    "nonce": "0xd4da28d3c32a76731fe9319422585894f5dd688b25a84b4604a19affbdc543a6",
    "signature": "0xc5fdc910977c38865159c1920236021604693d609b0d41ffbd105e2965d02dc020796da0f8b8a2113228de418a0c59b6f54b2a07d584380feeb1f35bde3906961b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}