{
  "manageEntity": {
    "action": "Save",
    "entityId": "1748628228",
    "entityType": "Track",
    "nonce": "0x1b2a074cd59cc20bccf36572a4241ad9bae31ccc687feeefced5fe9509c3054d",
    "signature": "0x231bce12f40ecd80a1466c68257287f02e6ba2cdc3138fb07b303103a4e925c928461f4cd9f22395fc0ef747e89fa039dad799100da4ea70614cc0018d624fe11c",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}