{
  "manageEntity": {
    "action": "Save",
    "entityId": "1492190176",
    "entityType": "Track",
    "nonce": "0xeba9d96722319ca386f5133e4d7b9a9e46ca6dc65986c540c271249346c6b9d1",
    "signature": "0x23e5960edf4ba7bf87202445e1fbfdfd4a9c615eab599177e7dc4000caeaecd371b452360fe6d33875e59f1dac088abd13388b5dbab778a59535cd462a37df1f1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}