{
  "manageEntity": {
    "action": "Save",
    "entityId": "1879989614",
    "entityType": "Track",
    "nonce": "0x13ebdee5c73e165153426fd2db1d05ec9bcafa690347d4a6ccc545d3b6052beb",
    "signature": "0xfc55702dc51f469fc0e0689759155a6b328c9449680001e8be4a6514b366292f38550cfde0f22a65fcf8cf8409f28cee42d097bea4eac6c4c34f723d05f7fc8e1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}