{
  "manageEntity": {
    "action": "Save",
    "entityId": "26667303",
    "entityType": "Track",
    "nonce": "0x1019f0f06ba79fed9bcd1328c2d7ae99006e01f9fc73ffbb422a2eb0f221d8c0",
    "signature": "0x10a6f0cfcddb79ee15acca78df2c9d5ab9ee4969b593fcddf127962f0e03fc8636b0192a5ebff385aeb00f783ee2a2190ce11050e69d2dc1e5fe33c4ba0c714d1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}