{
  "manageEntity": {
    "action": "Save",
    "entityId": "1686754501",
    "entityType": "Track",
    "nonce": "0x4982eaddde342194274429d54a85c084e2c058109eaeb60214293f6068cd79b9",
    "signature": "0xf23bdf0d796fc19ea40608d70e36f8156dcc124492936d1c6b78ee5590726bce71f6d2421298908ce9aa19522f95ec967d1667446c52c2f5416b0cfe1cafeded1c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}