{
  "manageEntity": {
    "action": "Save",
    "entityId": "987910",
    "entityType": "Track",
    "nonce": "0x60bd768ff0c9984c27223e2438736be943d09a248f7d6fc591e62c808373d9f5",
    "signature": "0xdc9afa018c860e8b9cc5387dd787f16285cfc745d15c0eaa9451549ea0e6cf405f249e4bfb991b146310aad375412080f10e72b701a0fbf050a74c2307d689481b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}