{
  "manageEntity": {
    "action": "Save",
    "entityId": "1018963",
    "entityType": "Track",
    "nonce": "0x5d0df3111b784939c19f072b4538cc9dceba82d809e5b5dbf1086bea9ee883c5",
    "signature": "0xfbc420cb48d9b4667747972f6a0f7557e16be6cb9f063222327766a6dca24e9454ad64e799ccff27ecd04326f31aea29bbe13888a24c32bf3e0f8339a05326fb1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}