{
  "manageEntity": {
    "action": "Save",
    "entityId": "664092963",
    "entityType": "Track",
    "nonce": "0x06ec584722d518b2ba25599821dc12d504120d91fc602046dc6c0e7a1938a728",
    "signature": "0x5ca2c39e45909acbd98b6186706d46fef25ad40df87d10d01057b383aa2e251222eb263f46aa514f3e8d8f6846f75f6cafabbe6191b13ccdeab13c48516ebf351b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}