{
  "manageEntity": {
    "action": "Save",
    "entityId": "562681537",
    "entityType": "Track",
    "nonce": "0x6226653d31013a2fe282bc7417e38136e15d3eb9896cc369e2543f78fef8712b",
    "signature": "0x2159a5968607b032eadc86725960c0cbc41f27afa0db83bbacccabc2839c911e2bdbfb1d52a709ca50d0d679fc563bf63c73ed4c3163dfe842e01fb334c9de231c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}