{
  "manageEntity": {
    "action": "Save",
    "entityId": "480210",
    "entityType": "Track",
    "nonce": "0x1e9eab3e9d18ae91fa08707b0e56850c0c104b16e91bbb7474d06dfd4abd8dc1",
    "signature": "0x8128c44bf58c46c82dd2f53c0af6f5e88e95a87fcc3054ceea5ae671c82b311519c55f46f8ef7d845843f617d8583dea3954be9930d9065e16a69ff3d52193741b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}