{
  "manageEntity": {
    "action": "Save",
    "entityId": "358392140",
    "entityType": "Track",
    "nonce": "0x7bc8da92ff50cf9af7b4486ff52bba6dfc0e8033128cffbf208011eeb04ac07e",
    "signature": "0x4a814bbabd604bef64f25c81047685702ec0a9a281ee030e6ef0f9cc0e9ad9391697685e94477dac2525735a02f235ff32fc50d420efda6a8d7105232896ba4b1b",
    "signer": "0x98B3f06eAEa080E8d8b1C86F1c9FD36Eb33dEd5D",
    "userId": "615702798"
  }
}