{
  "manageEntity": {
    "action": "Save",
    "entityId": "746430363",
    "entityType": "Track",
    "nonce": "0x215334939fd6304b946f6f4013fd56455367dea995fb2a6d9fbde28574ca9576",
    "signature": "0x0bb79b7a7e74719854fdccfc97dd9e485163e41171c7669b603d91d08ae9ae4d606a39131abfa56090c0ffc8f349a1291b2b21b03f2fe8e791862680641a661c1c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}