{
  "manageEntity": {
    "action": "Save",
    "entityId": "1920425632",
    "entityType": "Track",
    "nonce": "0x6305a798363bb80dcf97b79c5fcfadeb7975e7ed1bc0d7796933dc6816e19e37",
    "signature": "0xee3891c334a2f018e100b63ce523ab560f9a8afa96b461c667644d1807f1a2db07d24843c3803fa6f122fe5bbedda1a39752c922406f9b63cc9750b80bb976741c",
    "signer": "0xBe0B2B2beC4B0A46ff11169512DF7f66E775c0B3",
    "userId": "196632465"
  }
}