{
  "manageEntity": {
    "action": "Save",
    "entityId": "761245",
    "entityType": "Track",
    "nonce": "0xf16be16e313e16e123df96ade16b61e199a74d19d8e97a0a8285230d7ec1d27e",
    "signature": "0x095c71b703946398a1a5a2b0b0bcb739debe67674a1c732fac6336861b5e5b9e01cecf305bf8afadb604aaa25a606667e22734bc8103d3b126cf6a2f7b1813791c",
    "signer": "0x4D8EDeF47b57f98c89BDFf851267B0327BE4cD05",
    "userId": "5307724"
  }
}