{
  "manageEntity": {
    "action": "Save",
    "entityId": "1274245020",
    "entityType": "Track",
    "nonce": "0xf93164accf8ead1a4af59b67db8bb39b6bc600d49fe02561747021f98062c735",
    "signature": "0xe296536123c98c503d25ca09c18a2c69d599e06653a1037cf9c7e70e1afd20d941f0db48644244f6944d52969ec635662c20f366cea13ea4190951a08fbd0cdb1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}