{
  "manageEntity": {
    "action": "Save",
    "entityId": "1532955275",
    "entityType": "Track",
    "nonce": "0x08a125740f379fcef5ecb8f74ef0eaee53f552b1a30871dae2ae54a13a305096",
    "signature": "0x22a9588759748197b4f99efacd0a370e332997d09a989bcd3575671ca42f67307989c78fe79a59725807ccb2488039ab523c8acb5946f2cf8f610bc6f5e8b8261b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}