{
  "manageEntity": {
    "action": "Save",
    "entityId": "1696475097",
    "entityType": "Track",
    "nonce": "0xcdf7e11cfd360bc4344000448737f0ed933a25fa38edfc4b2616d48edd45cfba",
    "signature": "0x61b5756d15b3f9aee5441d6b316eb5ddfaca6de650bc0726b1d60e64cf13d4dc0b4de92b810b558f867329a6c395942319553d20fb2a7ddb8435c1965642da1e1c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}