{
  "manageEntity": {
    "action": "Save",
    "entityId": "1408614663",
    "entityType": "Track",
    "nonce": "0xe4ba16198fcb43fbcdfaa3e9e1e322a221e5417e2dd640fa100e39aa463931c6",
    "signature": "0xdb15faf5176f6ff08fde601aa812053704f246e7a51ae72a10c0734db5b7345a3ec185c661660515b71d724caf89f92b9e9a799e62ba6dbd124e3c495619a5b01b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}