{
  "manageEntity": {
    "action": "Save",
    "entityId": "756031",
    "entityType": "Track",
    "nonce": "0xf9b3152fc5b5d9313631518363d91ebb47fe9df4ace15526630264c74ef849b8",
    "signature": "0xa78a5d408ef538730e49bae049b8293a6c3925b266eb1bd8c2d655974128fe6c4911f3227b1b56110c58044372724996a3b2629d7a893a03cec008324d201b491c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}