{
  "manageEntity": {
    "action": "Save",
    "entityId": "813689404",
    "entityType": "Track",
    "nonce": "0x69351b861527a103d0b5b9619116636a5ba7914649a644bd5478a526e75832d2",
    "signature": "0x84e8f26dcbeb35cbae6400c0b30a2047fc68138b72a107eab2cb626f48067af24d764f97c00298b6068a23e28a1646e402a9d24ceb4e95bcf58763ae0f14c7cd1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}