{
  "manageEntity": {
    "action": "Save",
    "entityId": "1594780559",
    "entityType": "Track",
    "nonce": "0x80ef9b356cc13c254d8826f66ca8353065751887f0366aa26e4f30559d008350",
    "signature": "0x300f2512636818c3fcf2f198f9e06e2c5cae97a35d1819d9064557c4f3b040585545689e3b6584b86815121893fb490fe62866a70bf44a7c96e1a7e172bdce5f1b",
    "signer": "0x92328BFDeD38C9a9De6E253A0CF5CB46A3B28611",
    "userId": "831117417"
  }
}