{
  "manageEntity": {
    "action": "Save",
    "entityId": "1627392988",
    "entityType": "Track",
    "nonce": "0x0ff8dcd147167f3a07bdadfd2dcfbe93166084e60a70fe78b726ce15e07c1e29",
    "signature": "0xba0ee06a2665dab9d615be88e87ab97cfb114e7b7dddb8407add4f84bae272fa557edbf1b6d169f35dff3c7c10049a4cd6a52e8d17359f15af295fe29a60ee4a1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}