{
  "manageEntity": {
    "action": "Save",
    "entityId": "948298",
    "entityType": "Track",
    "nonce": "0xf93a72968dd7284345c2d4ff6e6e1ecd626a05c0e141223dfb59d4f0216a7f5e",
    "signature": "0x9553b273a40bf12f7c26ba3a1b9e96978fe66147eaf2dbed5d0b13a03ed4318722a334c6923dcebaa30a746aaa2e0260c33ee3a670d975e7a1755719d26ff0841c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}