{
  "manageEntity": {
    "action": "Save",
    "entityId": "1317881739",
    "entityType": "Track",
    "nonce": "1792355874530635739",
    "signature": "0x121072761bc9c2767969f8adfdb3ddc274083c5cf2fd02f3bb23a072164e8513202fedb0218bffae80860800be68950654f7e2b7f75094ce9390648d23ffc18c1b",
    "signer": "0x9B241b1a6A99d662AE67D328e091Fc94faF23fdc",
    "userId": "881446128"
  }
}