{
  "manageEntity": {
    "action": "Save",
    "entityId": "771928",
    "entityType": "Track",
    "nonce": "0xe4b66dcc12ba8385e297afa0585688f6540b3423b6a38b3c079f762bd1636599",
    "signature": "0x6347ae60d5b15cee05f3246cdb8010c799f3d53d28c5f572fa498c1f7cb48b4b229d155a69959fd8efb3de388ca3e07c36b5aa93cf739399ff61e5b7263e54cf1c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}