{
  "manageEntity": {
    "action": "Save",
    "entityId": "2031791419",
    "entityType": "Track",
    "nonce": "0xa4f5a754f2d7d4c0eea59ed7a767242578372d8156eab6beca360d21b2595ba8",
    "signature": "0xdb3fdac971899a0154c28d4d924adc32da22c549a1fe7d83c225f06d121f51be59878656ee40604a64951350b4ebedf9ed28183372b7e2666611b39221c06a661c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}