{
  "manageEntity": {
    "action": "Save",
    "entityId": "463283213",
    "entityType": "Track",
    "nonce": "0xaf233fc7015f15a03261c9e9ba6a7973f90013a89c3808c84b9485056f2b1f0d",
    "signature": "0x2a18f5e5816b089f5512ddc61e4513dfdd5b6e6392b2385e5df8e36d7e838ee25745ec4796a991adf58a4800e494d0dcdd389ad0079f880eb6ce3fad744e41f31b",
    "signer": "0xd85E4A094e4C057572A9D525C9737051A17ab609",
    "userId": "696716320"
  }
}