{
  "manageEntity": {
    "action": "Save",
    "entityId": "775907867",
    "entityType": "Track",
    "nonce": "0xb86734121f4d360306681a31835c494a60e6b693e8430ff8506996b39c4325bc",
    "signature": "0xd885f4fefda637ad0aace717ec34466a348d0b97dc48292fd0d4ecd14d77f06b6d9967e6a0d7177c143641761a4baa33541349a05305a89d2a0b9c15726533211b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}