{
  "manageEntity": {
    "action": "Save",
    "entityId": "66995911",
    "entityType": "Track",
    "nonce": "0x4859a61cddd6cea78993c0ad840205af1c23a5485fccbdcf8966e723a335cf46",
    "signature": "0x5808cf83f9aa02db24e2cd1b0b1a3a5882f5b6043a40435bc1aa5da2793a76e52d09df4e9acc1ea751d52fb54b86cec80cdb642bb1e1bba0e7f1fe005e57c4741b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}