{
  "manageEntity": {
    "action": "Save",
    "entityId": "353874440",
    "entityType": "Track",
    "nonce": "1794073052650827431",
    "signature": "0x0f820e83bb3bf434b1aea0377988fd2449cb74211e8c427927d4ffeb01a4b8a0230dd2ba73b17bc9c8f049de34b41a67223dacf84ac96b1e57c998a848468c4f1c",
    "signer": "0xEA2776495C3D336831442dA2d7f4cC9a97eFa6d7",
    "userId": "488857639"
  }
}