{
  "manageEntity": {
    "action": "Save",
    "entityId": "608364786",
    "entityType": "Track",
    "nonce": "0xcdb7a1302d0712a32119012382d3fdc71051790fb19deb60ecff9e2bfb65a5c6",
    "signature": "0xacc68e18b65e8bf80ca7f258f371897921e4dbec5611e419209d10a6f4d172aa2372e845d43071b288871bb3c7b69fed3dcb999e052a006f090ac3b60e5183da1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}