{
  "manageEntity": {
    "action": "Save",
    "entityId": "194589",
    "entityType": "Track",
    "nonce": "0x2d82d21b6d2c5a051bebde05c236df15f8750202aecaec51dbf6a0df56fe6a9f",
    "signature": "0x85dc5cfda7869a5e1eddc5145a15c74b5fc43e40ac37a4bacb009935d941bcf470b8b83b180b0c21b51bd58c525dcd61180f999f5f5f588fc6542fa9546f6ba41b",
    "signer": "0xc77540EAD86038cb26A711997ed5e69ac02B364e",
    "userId": "790654170"
  }
}