{
  "manageEntity": {
    "action": "Save",
    "entityId": "656170676",
    "entityType": "Track",
    "nonce": "0x0667dbc8ab7c64fef95bc582a99d97b52b54ec0fc8dd2b83017fe7c57617bc96",
    "signature": "0x7cedc46b77faa4eae07bd80ce1e2c6f0b27b40a7007a156e21b4af3d25fd30b00cb760dc7ad8a6d45dfbacbada1dfdd53e0ea752e3dbf03a5b8c28f640229e9d1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}