{
  "manageEntity": {
    "action": "Save",
    "entityId": "952679644",
    "entityType": "Track",
    "nonce": "0xb8bcef83ec2ee16943938f8cc737b41e767fbd50d9b77c579f03ef968316e0c7",
    "signature": "0x629d444575e59a1539673fb364dd6e08a01135c8eeab3db36cc890e5207e7dc1688561ede2a7a4548d8313b9bda8d26b1ae1c4d1ff89ea4a70a9ce86b3c1c95e1c",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}