{
  "manageEntity": {
    "action": "Save",
    "entityId": "202235887",
    "entityType": "Track",
    "nonce": "0xf81b397f9a06e151dcb59d976ece2231fdd4f7f666b3bf7b3437efbaec68a0e8",
    "signature": "0xbfb66b644bb966b2acb2e3d74977523c92881023efa6c6d3240b37a2d3313986092d7d45b7f383b5b86627def7d58bf0904cc4893a27afc814fb815739969f4e1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}