{
  "manageEntity": {
    "action": "Save",
    "entityId": "296268601",
    "entityType": "Track",
    "nonce": "0x1ab86214727ad59ac6f0c13d549aa8b5e058e5527b582a5f6404d63a7b857c41",
    "signature": "0xab5c0d233b8e1b49428a28d45e64cccd5e5e92a3ba4806c67d600b134ec68b1917dedf408c15499cf16665585d5bfcb1a6bec2c72bea2cf7e0e0f9b118eabc191c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}