{
  "manageEntity": {
    "action": "Save",
    "entityId": "347446458",
    "entityType": "Track",
    "nonce": "0x1c3955a263c840b8f168dbc9b9b06660a300cfebd0947cd58383055506ccd905",
    "signature": "0xbd2f8135f36cd18a3dcea7a6e1e87114fe7c36066eaa69064bda5db32227b96f1c67a796b987d3f343de98c3507b5959a5b5ae62d03f723a0ff6d9b24bed7c141c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}