{
  "manageEntity": {
    "action": "Save",
    "entityId": "247920",
    "entityType": "Track",
    "nonce": "0xb025efdff2451c3393a151fe4496cfdca0474e4a165eaa072ef161af96eaca70",
    "signature": "0x646814e8f1152f8a0c8e0f4f03650b01adf8cf1fe6efc71f5c3deb4665c09db4261fc39500f420412cf1a020616809984a0d4cd1b7b61e6e6de098d3a1a9935b1b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}