{
  "manageEntity": {
    "action": "Save",
    "entityId": "809565",
    "entityType": "Track",
    "nonce": "0xd9177c8c185e6d5749937248bd1ad175ed26a1b02ed8106a1e8c309c54a51e4e",
    "signature": "0x4c91811d548c5d9edf8c636c40a5e54926eab8559812116a0e7d44268d1a84da53ec21d290f1d8460c38af034378fd815ec2a384bdfc92a482832f9a62e8fc851b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}