{
  "manageEntity": {
    "action": "Save",
    "entityId": "2100851746",
    "entityType": "Track",
    "nonce": "0xf8a092aaf5dcfab3f881fff1fdf81f733ce6be34b2b95bf2c73ea0a60999b5bd",
    "signature": "0xd9eb9618da7af3322f8055da38a616c9b559922f80c0a85e7cde29fe713e589a7db02702977ea8c7b385bde7dca3a3b5b2ab48884b1397ecfd961b9828e93f071c",
    "signer": "0xC6b9005ca9F7522F39eF22242eA15410A21DfB9A",
    "userId": "390992303"
  }
}