{
  "manageEntity": {
    "action": "Save",
    "entityId": "1046952228",
    "entityType": "Track",
    "nonce": "0xa6cf354b541b8d549ddcdfde891f41719ba0889a1cbd49cccb0b4c9ab2fab381",
    "signature": "0x7c4a64773a6204a0af02339e355abe440fce2f0b5a8d4d7670170857976a3a4b254ccc44a4d194ddafe96c3a6923fcecb4ed25507dd75af5659fdf37015d98191b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}