{
  "manageEntity": {
    "action": "Save",
    "entityId": "851291198",
    "entityType": "Track",
    "nonce": "0xbe37045ab6ae042f07e42dc39261774e700983731b7d8729be09197ffd4c4240",
    "signature": "0x915b1c526b4539ce304c7500bc9f6789c1079a869ebd990647d7bdce723a45d0475643d9579e26e876f410fc55b4da08009e8cc861c23e0037ad9c4f857eda0c1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}