{
  "manageEntity": {
    "action": "Save",
    "entityId": "330158747",
    "entityType": "Track",
    "nonce": "0x8453d8dde201a26dcb15ca2a5615f896b9b02a255e9fb697bf2e526c7773d21d",
    "signature": "0x93c5561282fe3a6b224308d5081aa5d953f7f862eece70a465fc4fc4ea5a7f232e69e97a79fda4f5787bbb3f8aae86e5f8d17656476dbabee0b91022d15ebcd51b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}