{
  "manageEntity": {
    "action": "Save",
    "entityId": "108768",
    "entityType": "Track",
    "nonce": "0xb53081e7c92960d16455ec3ff35c305728b364fd762ca1189aaa6de720474ad8",
    "signature": "0x3a5edfb5b9633cd11a5a7c23376554f3432012bb65c9ea13478380b5026d987e1fade2a1904c25389c1446315d0e6f2aa08a84cf73e07d21409387125dc968dc1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}