{
  "manageEntity": {
    "action": "Save",
    "entityId": "424648332",
    "entityType": "Track",
    "nonce": "0x40bc288902a6fcb504b79368d85dd9e3a676e76cebd9a5df1a4a2bdc59a2db26",
    "signature": "0xf9492ff933eecdb4a59e1a18ab85c4a70849ac92f3c6663cfa84eb0127104e7527bfa02a51b7bf1aaa1e8ec85ae5998d48181bd233edac277591fe5c2444b3991c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}