{
  "manageEntity": {
    "action": "Save",
    "entityId": "1780820793",
    "entityType": "Track",
    "nonce": "0xc9afbb06889055beb8395592d25c78d6934078e9c0783745b27bf93fe3344846",
    "signature": "0x22c555a4f76067990f0b7999bbe0f4c4a061acd20027be0c70ce7a8d87e06acf05e97faa3c1031772b703eb2cf7f5c06d0f08c2f144fcee620c9413fef7848c41c",
    "signer": "0x9FF2A7F5Fab732dA57359bb3eD63a95511bD1329",
    "userId": "67863854"
  }
}