{
  "manageEntity": {
    "action": "Save",
    "entityId": "1544231029",
    "entityType": "Track",
    "nonce": "0xc16a9d1dbace7636a3f8aade245ffef02ab1aa320ab43e7070e2d3677433f167",
    "signature": "0xb9e5369eeee2690dff8ef6ad1e070e6168f742605bd41143916ae5af0047347946407ec1d88b2031984b18cf52dad9741a4e01b5bf3e0ecade500f5a4572e4041b",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}