{
  "manageEntity": {
    "action": "Save",
    "entityId": "215770048",
    "entityType": "Track",
    "nonce": "0xe694dedf3d181b1c006693abecfafd7efe3d0fe53f765e357d2a9f92024b2134",
    "signature": "0x76bad32e7f4638e0d9437fd332c9326aa4e3e1d0473ce2c0506b6fbfc1e539104202a6635a2ac3b2a824dd3292ec0b9a837d79bb36a5bb6083939c9b321971501c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}