{
  "manageEntity": {
    "action": "Save",
    "entityId": "218690092",
    "entityType": "Track",
    "nonce": "0x1e3c3b53d13488044bf33f7788957cf6b782cefa69576d3102dc6834559160a1",
    "signature": "0xc693fafea679250a89517e97e72c77a88f1d13e6c6957dc60239ccf075592cdf2e43922fb13f188f66918d3c31d79acfe0efeffad46a5b45b896bf9a9c1c95721c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}