{
  "manageEntity": {
    "action": "Save",
    "entityId": "16798938",
    "entityType": "Track",
    "nonce": "0x05bca6cde16548bae4a231dbe1118d9eb7acf867c209ea188caf4c9f55653d89",
    "signature": "0xeef8ce20e95b88cd7dd2af9d6713ce735767ebf14676cd0093d3a3b406a8d48b26a3018d064c0e75a57a9f77d2910294b35aa5f5b12fde7f580bfc4b78587f0f1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}