{
  "manageEntity": {
    "action": "Save",
    "entityId": "934616554",
    "entityType": "Track",
    "nonce": "0x843dbd27130bfd8b678c97cbee2d0105d5abe3b017ca923456da70db4faae505",
    "signature": "0x3a32aeb7a07bca1fccd780eeb5b67223ee0f80c4e45bd65bf209ddfb2498f64108429ed1fbb903de8cff8db7a14de6281577502298257f3ef1b7fa87df3d04de1c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}