{
  "manageEntity": {
    "action": "Save",
    "entityId": "373515244",
    "entityType": "Track",
    "nonce": "0x27fe316112a7563caaa5b0b8e743ec5cc5323a11edde86a28c7c6d11f67e0544",
    "signature": "0x63106a01f605006559d00b36428bf5cd229cea8bfc2894626963a206295ec152711ca172789a2adbcde42a2885002862985fdae6c1d4850b66718ee2e717ffdc1c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}