{
  "manageEntity": {
    "action": "Save",
    "entityId": "480558139",
    "entityType": "Track",
    "nonce": "0x05031484129ff2e015f5432c08213040c3d1da6ea4118a448e3ee8d7e41d0489",
    "signature": "0x38fabfd11216d3ed01aa16ee528a151da81044609cee3b7dd5ce20b77237d1c53757de2c728680cc9ab2a047b6a4671f1dbb07a4695ba96f57d5d4e4d819b49d1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}