{
  "manageEntity": {
    "action": "Save",
    "entityId": "1090517318",
    "entityType": "Track",
    "nonce": "0x90ba6d5d2568a6ae89f373f0fd75cac54888e633c7a1dc6625af4382504d4410",
    "signature": "0x7f41e5c34b7b99af3959166d472b3a5df688744cb47bb1c99949d9c218fa213a689d6deb49029d08d47e5055ae6ffaa2c0eb44f0e5bf462570bb35c5d5b094b61b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}