{
  "manageEntity": {
    "action": "Save",
    "entityId": "486774385",
    "entityType": "Track",
    "nonce": "0xc5993be39c383442f875bf70a457acdaa4ba85613a385df2576d9c61ba64a24d",
    "signature": "0x2659319703693df7f1b0c00d9be8d05aa26881bb13f2eefe6ff8eda49d1cec9c4eff44ce4cb8a2a4a51578e6ef4955e45a6e031a7c8601d630a9dd54e830fd1b1b",
    "signer": "0xc90839A5D830Cd5fBe0a79382b86F5178Ca98234",
    "userId": "617114289"
  }
}