{
  "manageEntity": {
    "action": "Save",
    "entityId": "772939",
    "entityType": "Track",
    "nonce": "0xe08734c699e9b528815daff9772fde3c637e726cc2e0ba63d48d746478a096f5",
    "signature": "0x1a901767d63dfe5d306e789921684621a867ec8a9096caed668be220393f368c4708961ca1d1fc459ed04090ce21ebe8061262275a1205ad421d3d8eb8de7ae11c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}