{
  "manageEntity": {
    "action": "Save",
    "entityId": "293210564",
    "entityType": "Track",
    "nonce": "0xfb38daa751eb99a2c17eb304c82c6b90bdf28b66c103c400f0cc684e981e71b2",
    "signature": "0xf42d66f097715b93c4248f4e009deaca25b238a01126522a66e8ee7ba1e34ecd53a26f8edb3474534a9a79a24761b9b8cf25d6aa165107fcd2c956f5b19b4ca21b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}