{
  "manageEntity": {
    "action": "Save",
    "entityId": "532323415",
    "entityType": "Track",
    "nonce": "0xe789740bc2ff5e56caf1c4f17fffda91752864987882e63708c0e94c74b5258f",
    "signature": "0xad5858680a63ef951e478dc232378286249889aea0632bdbbdcb2960db0c809316164c058a4a2bd3343f2d612a1098a20253b0a1cad3cacc2b73314989669e4f1b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}