{
  "manageEntity": {
    "action": "Save",
    "entityId": "1871722974",
    "entityType": "Track",
    "nonce": "0x816a9e45d19eb61bad4dbbb061fbb4b25ff66194af1e2d4fd2ba14d218294ee9",
    "signature": "0x6deb702bf9cf7fd03d0f86c0c35d1cf7e85f8e35c0130fadedef1cf20501077c7e355cb3cd342d137a09778fb70ced934e41371c8feee9e56ce762c4a97dac811b",
    "signer": "0xC033Ec247eF0783191be445Ba72145A646894f2F",
    "userId": "834421604"
  }
}