{
  "manageEntity": {
    "action": "Save",
    "entityId": "814302",
    "entityType": "Track",
    "nonce": "0x187c83269e5b4273927d10fd502f419b70c87c7aa0617577b533617796b9b2ba",
    "signature": "0x4a567b586e3b220c149091eb2fe423e77475ef7de83b83d3c7a6544df6ff17a224d70983a2101759fae95dacd9263b85dd204b1fa192e0d314ba804536844bd61b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}