{
  "manageEntity": {
    "action": "Save",
    "entityId": "1445676310",
    "entityType": "Track",
    "nonce": "0x1df403b2f1ecc3e46135e0c73f2ef2b52b848e851123f1af5d825bc35703bc5d",
    "signature": "0x931446997fec5f8620feaffd4d64a0ca0b425044987fa19f118aa9a79a89e521211709b360e0c18a4e3bb42a0d2ca33ea6def2480fa243688a08b0319cf01f311c",
    "signer": "0x4993C3631eecd6e8c1635351A99C2103C7d6Be4b",
    "userId": "906184213"
  }
}