{
  "manageEntity": {
    "action": "Save",
    "entityId": "779197145",
    "entityType": "Track",
    "nonce": "0xfce258a7aa3b6eb903591b6d14bf72702bae8c9911abf11a3ec1718181ba3443",
    "signature": "0x8aa8e1bff07ee19968032b73fd407381befea6941741ef6ad1430998d425c89f3ca7ff0b64b76506ccea68515ce649b0299d2a3324902b3138b8e7c32973f79b1c",
    "signer": "0x2B28feb1CA15953a5a910C4E741698a24e8b3FE9",
    "userId": "887020893"
  }
}