{
  "manageEntity": {
    "action": "Save",
    "entityId": "1886236479",
    "entityType": "Track",
    "nonce": "0x9d2b518d43589f3f01d9c8bef9bca95fbbf182ff5e6ebfb9386f7612839f4171",
    "signature": "0xa4f27a2db835ebbf7a7db20abbe1933da79a0986b2c605094d077f0f8658aec333c54ee3dd26d0d3198c5e06d942a9b7060d7aa4a52a96dfb3de2d2e74bd98881c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}