{
  "manageEntity": {
    "action": "Save",
    "entityId": "424242",
    "entityType": "Track",
    "nonce": "0x5bb8798e88d77278ebd22294b7ec5d9cc4c55f96913f0f7c7654923fc633490a",
    "signature": "0x0eb08c5e699013fa82d698e978587c04d506a8d35c01d53f6a61e48af09ff1222a471b58c7437f9d94273ee53defa1807755c1393546ee03aee2f576ea7b218a1b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}