{
  "manageEntity": {
    "action": "Save",
    "entityId": "1511661517",
    "entityType": "Track",
    "nonce": "0xdd2f57f4040abd1fdc74e62978cf105beebbbddf87eb65fb2d0ad2fa2f06e1e8",
    "signature": "0x145e5e2550deec7b66235ea2369f9f9bc776cd4a687e871fe3f092b35d92dad6427b97eccf4d30887b63345932d30afc96785f02f708b212033290d2baecb2fb1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}