{
  "manageEntity": {
    "action": "Save",
    "entityId": "1713339501",
    "entityType": "Track",
    "nonce": "0x811f0d6b0a3903f8709a6f71c62b961a9a33c1fabd24a0dae6ab884a38f1121d",
    "signature": "0xc21289394b63f7fa548cf70f08633a76922a76c8fc0519d2f0218a52b0966bae7f2ed445c45f3246c270b4b9e7c43dd4dd7d44b740c924ce388901e8f0580cee1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}