{
  "manageEntity": {
    "action": "Save",
    "entityId": "2119212222",
    "entityType": "Track",
    "nonce": "0xe3fa661cc117f15c64eb039ca1a2df9b18436e9d31daf6aeb1a7670882eecb01",
    "signature": "0x8f247b3f09ed20eda7499472feda365b4bce3cded664a30cbf2fca7d9b202c084c9a72875bfd67375f44e5e5d7f41c3739305f778fd3da4292347729b3b181051c",
    "signer": "0x1A748d74Db6424f9EA1Ce41A3A445631765103bc",
    "userId": "799948905"
  }
}