{
  "manageEntity": {
    "action": "Save",
    "entityId": "1341538858",
    "entityType": "Track",
    "nonce": "1787243473250135110",
    "signature": "0xf4d9411f7c463f8021bab14af9b256bfad54784d13eaef30c0ce3f8d0bb67beb2fb6ad1648de6c23a5d1dd46a6b1c2c10c406ffdb3a6bd2a6499e462329058e81c",
    "signer": "0x512F9723ECbDB6Dc537A671b3D2fb35CC68017a4",
    "userId": "105562689"
  }
}