{
  "manageEntity": {
    "action": "Save",
    "entityId": "587514856",
    "entityType": "Track",
    "nonce": "0xf3f99f94d84dbec05d68ab221e6550b6796857b819b8e9dff8a49316d97935e3",
    "signature": "0x823fcdcb2ecffab164aca435afea7f4f121bfc0cf25e79d2abf3ea643a08488232675319d196c401a58f58f51a9f069932e54c35485d469f98caa6d5fea6bf241b",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}