{
  "manageEntity": {
    "action": "Save",
    "entityId": "1379001079",
    "entityType": "Track",
    "nonce": "0xf1d031bb46b6a54c1b3098228d4d122fd73eb6cc2bf8ea2ad97245140d346a43",
    "signature": "0x1cf0c5fe2f6e5f417d8a42ba07a2cc673224d054c328f9b920bc86c46888aae923dfba90d5391764f9a6c9c26d71e9bbc5a04b7a9e9bfcf14d6284810cfa6f881c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}