{
  "manageEntity": {
    "action": "Save",
    "entityId": "1884056095",
    "entityType": "Track",
    "nonce": "0xa7affcec1934f41d9acaa8582dbd72ee129382d2bacd4ea76e6b7e7fc5624301",
    "signature": "0x98e23c6e56a353f9216d276b32bc2d45938480417f71ac1efc8c565b7c0a75576072a285e77244effd598d3c6d583f432b153b2ae6fc0f0ea1a660a6dec10f931c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}