{
  "manageEntity": {
    "action": "Save",
    "entityId": "1964200665",
    "entityType": "Track",
    "nonce": "0x8dc4e83182b3f7f1725231e0bb8cfb69f1392d7c94dbe998f4a7195d5a9a4958",
    "signature": "0x1c64cd87e99cd2111287caf56d0d747b007e6323d7c34e690b51dd80c443bad81325e93d69136976b262d552a0b9ad23f20dc89426369b1fc509f3b7d1c230e31c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}