{
  "manageEntity": {
    "action": "Save",
    "entityId": "1290740404",
    "entityType": "Track",
    "nonce": "0xe32d1cb81d7b0b1e7acc6e33c3f95677777de49289c5570b85212f05a27f9b20",
    "signature": "0xc394abe8a09570b943ef6ee3edda1315263a9cb1bf04c2f5265ad6bb14fad600520b65fc1d9c39418050f80ab674c14bbf6efae531ac6cbeb5d69010335d444b1b",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}