{
  "manageEntity": {
    "action": "Save",
    "entityId": "573595035",
    "entityType": "Track",
    "nonce": "0x38a3fe58f3b94bf0751667326c6cdad7a45c3ffd72a905faf3d795cf8b041b67",
    "signature": "0x32c653662968fb0849196dad76a930d7a1eb41d5f0773d9ad2a971545e3d323c75bf0e3c843b13e63b28df26fe663cfe9d27404409d0076ae102fa86f5a202671b",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}