{
  "manageEntity": {
    "action": "Save",
    "entityId": "480116963",
    "entityType": "Track",
    "nonce": "0x2198fd99384cbd5d5a85cb332a791bd98bfea47a680bd6f0347b63b3a72865ff",
    "signature": "0x55772afa60d16664b240df480bb3d72ac663bb6b1a155e8ef7203b83a825cfb8369e1b69e1227eb9e30f7fc1182a6cc11eecf563fdbb7737131ae533dc501cfd1b",
    "signer": "0xe718C117f3260e4EC103f89233bA76c04C7dEfa4",
    "userId": "156602599"
  }
}