{
  "manageEntity": {
    "action": "Save",
    "entityId": "2051259563",
    "entityType": "Track",
    "nonce": "0xaa6902f67f3898e41fc88fe2611d0d0dd1293226eb2a9c57a391650f63d69adb",
    "signature": "0x17b016fddfc2c923599029a1306adab9aed484433ccf760a5bbc2679ffaf37f27fedb17cb21ad2236f0d0ef568fc9459a7cc48b3f5548099b6f9a1628b24b20f1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}