{
  "manageEntity": {
    "action": "Save",
    "entityId": "970116",
    "entityType": "Track",
    "nonce": "0x8a0196d76886d694c2aa6a86010c7d5e3085d7159463c9dabfdeb7de92ce9ac4",
    "signature": "0x509be140404a55fd376a1cc68d03bce4dd343b4de08aad02bd6b22011761986a0182a274a8063589ecd7a3d86619819b9a74e7143976c00d6775b0726c16c9891b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}