{
  "manageEntity": {
    "action": "Save",
    "entityId": "1940214315",
    "entityType": "Track",
    "nonce": "1792299619111924307",
    "signature": "0x3c91c888934d5726b417fa7cec76c0748a2a75880b5d799e6337d82b5d642ee5459066383bb5e905c96b92befcb38c24fdc9a936216453cf89abe116af79f57f1b",
    "signer": "0x9B241b1a6A99d662AE67D328e091Fc94faF23fdc",
    "userId": "881446128"
  }
}