{
  "manageEntity": {
    "action": "Save",
    "entityId": "553657",
    "entityType": "Track",
    "nonce": "0x9d937a8ae4c0f7ee00654fd54d93d1a79119edaf5464715efdcf3e473330bb80",
    "signature": "0x9e0c68e4370c65efbc286c6deb196282a1e427bfa09a9db89bce06d386b578807a5a769cc48bd3807069f615ae5995404100b40520992a96003d298f149c735f1b",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}