{
  "manageEntity": {
    "action": "Save",
    "entityId": "345653118",
    "entityType": "Track",
    "nonce": "0x832351938b867287006ae599ef1d42631def5c9a52270f435ba4ee14f0c37bc1",
    "signature": "0xcccaaaf74e51de766d2ea5e9a6a8740dde7e24c00a536f943ce4d18f58ca04a264f9594d568dd2a6121915f8367b5c584bb5d6b79979f39ef125a170bdd336a21c",
    "signer": "0x592e47489Ba38bb457a23C5B4b997623eEDCD9E7",
    "userId": "483685202"
  }
}