{
  "manageEntity": {
    "action": "Save",
    "entityId": "1963132187",
    "entityType": "Track",
    "nonce": "0x898e99ecf79446a5bc588c6b0702da975a54388d75767ee6df932faf2a5a8cca",
    "signature": "0x271b66dd01827bd10a0182b81a971b355224bd82cb490846adb6cd709b8ea4520d3b4937914ecbdd0e7f279e58639fdb64a82718826ad527189b3eb8c261ecf21c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}