{
  "manageEntity": {
    "action": "Save",
    "entityId": "2043442584",
    "entityType": "Track",
    "nonce": "0xe4bd9002ee798ed4acc281c96c78e7f9a906a8d92f88686a11f46d954a4effc7",
    "signature": "0xa8488bf3a3edea6e6678342add0c258465549a72380b2797394beac64848aef82b94d9d11b31576194a49aecfcfd6023233939fb5e1732c881e56f55d135c8651b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}