{
  "manageEntity": {
    "action": "Save",
    "entityId": "1435628343",
    "entityType": "Track",
    "nonce": "0xe382e8d5db5231948ee31df6f64a483ee5047bc92f36afd8a35a15b949315512",
    "signature": "0x646cbb2c9abfa52e4d4b15e8b9557e82fce35417fc38b8ab9aa80a9612f4a81554aa665135083de1aa5583108afb7e1717552575975c813fcd6eea9d360ce2d31b",
    "signer": "0xD64b2D9033e011ECfbF35b2D18B86a439b9ABBD4",
    "userId": "309071067"
  }
}