{
  "manageEntity": {
    "action": "Save",
    "entityId": "990142",
    "entityType": "Track",
    "nonce": "0x10fdba23cfb8f2264b5212d08a20a03e9925964c5826fb66fabb5d32939564ff",
    "signature": "0x26cee47b6b9b306b230fe9c4229a9cfacdfdfc927fec6de53880ebeb1fd7ae792f795b48acb6c2e4bbdaf26769e7a98ec5ebbdee1f1c4ad4e99c2d75d363e2511b",
    "signer": "0x06F989586c5477333A41f6057f224Df79903862a",
    "userId": "24240642"
  }
}