{
  "manageEntity": {
    "action": "Save",
    "entityId": "607079606",
    "entityType": "Track",
    "nonce": "0xff395a37e0e772dc9a9e44721b3dedd122964c5389cac46978fb10d2d496c44f",
    "signature": "0x5c487766003b23e311039543130b534935427bc446fc1674daaf36e14e26074609ef1282b15830af12b4238cd180a7a026f1c8ed7caf23a07a181724e3abd3151c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}