{
  "manageEntity": {
    "action": "Save",
    "entityId": "177588654",
    "entityType": "Track",
    "nonce": "0x69459c6313af9bc4fe8f147bba2213d92019f1c8a6e7df393720e68657d6cd5a",
    "signature": "0xcb57b34234134fbdc3c63e2f21504def4ce6e4ceeb91590a6bdbf90779f8f4456c5833262305c45a28119f8de7a525bcd509e75c58806c915ac9c461d3cbbf951b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}