{
  "manageEntity": {
    "action": "Save",
    "entityId": "684550793",
    "entityType": "Track",
    "nonce": "0xe880509d1ad4499244a0ce9fcea271e9062b01eb49dc0f3edceb70e7d3bcb7ea",
    "signature": "0xae0946c4cb71f99d24ccef027f8d68eefb8290c665c23640d85d730466260eff02de773ea40c5711c1bd36cdbb780d3132185e932e40808cf3117049dd8167691c",
    "signer": "0xc03cf24b1C519dA6a18B6509c7F5C57d01620755",
    "userId": "870665506"
  }
}