{
  "manageEntity": {
    "action": "Save",
    "entityId": "2030647032",
    "entityType": "Track",
    "nonce": "0x1c7c7cd8a6a06cc92f276b5cca4caff7a0c13cb7cb25c31cddaac2f024096123",
    "signature": "0xba44dd9a403786f85b887cd85aab338fd4b4daf38738fa17d9ca94b0181be309580afc2cf8f22448f5054b8a1a486f18f3e5109f0244e5f7d624c2f758ba6ae51c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}