{
  "manageEntity": {
    "action": "Save",
    "entityId": "295526871",
    "entityType": "Track",
    "nonce": "0x556e81805e8efbba358dd880353c279feee9619aeba2d84fb9ce6ac1b6f2ca3a",
    "signature": "0x2b63c4262f782c859b9d3adf78e41292e65e061eb00924958816ffd532ad59824500ca2e33f9360415acc2930705b3f08058f1d2ef596f1afb67662972e4fae61c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}