{
  "manageEntity": {
    "action": "Save",
    "entityId": "286715",
    "entityType": "Track",
    "nonce": "0x9c1b056b1ef2b30db3df390504a7587d572916b52a989c19ca517509559f5ed6",
    "signature": "0x91c2fad03f39137a41942a48fbefc6eaa9bb4fd60a0232d0f6a4e48c6aceab514c26b927bf3ebc1317fc7a9c4ed90ef32926dde473a0b929b1a7eeadfbf8576c1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}