{
  "manageEntity": {
    "action": "Save",
    "entityId": "106903407",
    "entityType": "Track",
    "nonce": "0x81fa792605d27e98432a0eaee28503b47ac85625aedf820890dfc44e3a373cdb",
    "signature": "0x491d219f89c40221b920d8dfd4ec96f6087fee94df3bc41eb5d6f61d0742f3a758cb856431641dbded57922cd1ce0e8f996be0db86595e3881d5153cb4ebff101b",
    "signer": "0x45C74e4f36E4e5064C5321eeED3748fD52B04eA8",
    "userId": "133970929"
  }
}