{
  "manageEntity": {
    "action": "Save",
    "entityId": "1459616251",
    "entityType": "Track",
    "nonce": "0x19d7ac8675d38c61232cbaee12837682147d97fa5a88330e03e14ef9920c91c2",
    "signature": "0x74391b7e57189562e2ecb41b9901eeff40ff91616ef69100c86de5ea25938c10254106f5e93d010432f92c52378fa87b210b48c882f4ee84fe49de7efc335fc41b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}