{
  "manageEntity": {
    "action": "Save",
    "entityId": "2068716250",
    "entityType": "Track",
    "nonce": "0x300f5e6ccfefbecadbc14aecb63148baee3c5238417a699cc1db87f0f0eadf25",
    "signature": "0x22aba7853b39b7c576f420a754d10917a5718f2f2d151a90e7e3dcdb1152a9a1459d9d4671386be1c5cde4e194e0b9a3f02ae8bfece6cb69b9ecaa0481917f921b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}