{
  "manageEntity": {
    "action": "Save",
    "entityId": "230454",
    "entityType": "Track",
    "nonce": "0x830d4cfddc934341505d316692fa409d54597e5f4cbbd7dfebdbf542bd05d9e3",
    "signature": "0xadfb57e0754bc8d14dbb641cd7c9176fd801014d12abc833f3d476b99db5c60077c1c70a29bd46a33f11a1a9657f862dd04a3f9561824ec0c5f64aab2cca71fe1c",
    "signer": "0x21Bf75Cc555eE0A19Fefc54665189807c73DFFD4",
    "userId": "833426398"
  }
}