{
  "manageEntity": {
    "action": "Save",
    "entityId": "566059595",
    "entityType": "Track",
    "nonce": "0x91e0d7aebc962d57ec24e2bd8541b653068d8e66d31808d3bc03b20aa81b9524",
    "signature": "0xe9e13ccf6b03e095cbae171fd9f6ce168a938d85a21d0ff8a84dec2d8e1e93ba1b78851fd3df0895c044bb79138fc859cf7623f26f93c8e96130071d02f5625c1b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}