{
  "manageEntity": {
    "action": "Save",
    "entityId": "1163140816",
    "entityType": "Track",
    "nonce": "0xff7eebcaf82dddfd68f08dfd9e00348d56ae2d17af65726aababdcdd8a5a61d1",
    "signature": "0xb4c18633d208db27357755274c295ad5ba29750753341b86bc1c44ba39bf9cef1c5df70cebb82d1a13a9924fdddaf5385a1a3125122c0761a1b9adb10d6657651c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}