{
  "manageEntity": {
    "action": "Save",
    "entityId": "1075503",
    "entityType": "Track",
    "nonce": "0x0c9ef0bbfe52f33961001a7aaa9502a6de5176d9b90b398b9092cb093e487176",
    "signature": "0xbf4e211208a69c514ac73191dae0a5643b56b07781ca7efb1041edd6c878e9533d452927b6999456bafbd4e615f9d208bdfe798fe6bc19744b222afcde3fdfc51b",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}