{
  "manageEntity": {
    "action": "Save",
    "entityId": "1590036914",
    "entityType": "Track",
    "nonce": "0x2fc7bf958a7cd331aa5e0ae8a68d12825da20c233eba4a3b5343267e45e68867",
    "signature": "0xbd6d5a322c79da56b1686aa12a582293f5b5b6eab860a661350d6c7b545e9820083e45bebcc1213fb92abcec04ab6a8c0e8a0de2bf87a4619a6b3c439ce75d761c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}