{
  "manageEntity": {
    "action": "Save",
    "entityId": "3730634",
    "entityType": "Track",
    "nonce": "0x284ae28f74594e755da4a1b2649785b75c42ba4f6ef7ab122b972098263eed21",
    "signature": "0xc5629fe501207a7df1adc3e59923039a7a7ead6021ad7bd6caa7ecb728263d71605a8c58e3400de7d7a3404fa449b4f65b4941db250b31bbeaebd18169df4e4a1c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}