{
  "manageEntity": {
    "action": "Save",
    "entityId": "626289",
    "entityType": "Track",
    "nonce": "0x3601fc1f52eb25b42933fc97404b9b356845e12f7daade424e9b64c0ce37fe5c",
    "signature": "0xc572500673c28b45f854a08de3105e914120d68c3cd9c56445781ac945bf5a44030fe9600c65059ef1bda6e5501c10944f6182d0b7c855519e7aad342ae797381b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}